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            "questions": [
                23684,
                23642,
                23646,
                23634,
                23697,
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                23631,
                23694,
                23693,
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                23635,
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            ],
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            "test": [
                {
                    "id": 23501,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Trong java, để khai báo và khởi tạo một mảng số nguyên gồm 10 phần tử cần sử dụng lệnh:</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[] arr =&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>new</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[10];</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> arr =&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>new</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[10];</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> arr[10];</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[10] arr;</span></p>"
                        }
                    ],
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                        "cols": 2,
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                    "cdr": 1,
                    "code": ""
                },
                {
                    "id": 23631,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">1. Kết quả đoạn chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">[]){&nbsp;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\"> = 5;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">y</span><span style=\"background-color:transparent;color:#000000;\"> = 2;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>double</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">result</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\"> /&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">y</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#6a3e3e;\">result</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">2.5</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">2.0</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">2</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi khi biên dịch</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23634,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Câu lệnh nào sau đây báo lỗi khi biên dịch trong chương trình Java?</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp; </span><span style=\"background-color:transparent;color:#0000c0;\">a</span><span style=\"background-color:transparent;color:#000000;\">=20;</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>float</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp; </span><span style=\"background-color:transparent;color:#0000c0;\">b</span><span style=\"background-color:transparent;color:#000000;\">=50;</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>double</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">c</span><span style=\"background-color:transparent;color:#000000;\"> = 7.5;</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>char</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp; ch =&nbsp;</span><span style=\"background-color:transparent;color:#2a00ff;\">\"A\"</span><span style=\"background-color:transparent;color:#000000;\">;</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23635,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả đoạn chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">[]){&nbsp;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">=10;&nbsp;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">++);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(++</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">--);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(--</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}&nbsp;</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">12</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">12</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">11</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">12</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">11</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">11</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">12</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">11</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">12</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">11</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23637,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>boolean</strong></span><span style=\"background-color:transparent;color:#000000;\"> isPrime(</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">dem</span><span style=\"background-color:transparent;color:#000000;\">=0;</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>for</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">=0;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">&lt;=</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">/2;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">++)</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>if</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#6a3e3e;\">x</span><span style=\"background-color:transparent;color:#000000;\">%</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">==0)</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#6a3e3e;\">dem</span><span style=\"background-color:transparent;color:#000000;\">++;</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>if</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#6a3e3e;\">dem</span><span style=\"background-color:transparent;color:#000000;\">==0)</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>return</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>true</strong></span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>else</strong></span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>return</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>false</strong></span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">[]){&nbsp;</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.print(<i>isPrime</i>(20));</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">true</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">false</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Chương trình bị lỗi</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">20</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23642,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả đoạn chương trình sau là gì?</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">[]){&nbsp;</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\"> = {1, 2, 3, 4, 5};</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>for</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\"> = 0;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\"> &lt;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\">.</span><span style=\"background-color:transparent;color:#0000c0;\">length</span><span style=\"background-color:transparent;color:#000000;\">;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">++) {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>if</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\">[</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">] % 2 == 0) {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\">&nbsp;</span> &nbsp; &nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.print(</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\">[</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">] +&nbsp;</span><span style=\"background-color:transparent;color:#2a00ff;\">\" \"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">1 3 5</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">2 4</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">1 2 3 4 5</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Không in ra gì</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23646,
                    "question_number": 0,
                    "question_direction": "<p style=\"text-align:justify;\"><span style=\"color:black;\">Kết quả đoạn chương trình sau là gì?</span></p><p style=\"text-align:justify;\"><span style=\"color:#7F0055;\"><span><strong>class</strong></span></span><span style=\"color:black;\"><span> Shape {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>double</strong></span><span style=\"color:black;\"><span> getArea() {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span><strong>return</strong></span><span style=\"color:black;\"><span> 0;</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:#7F0055;\"><span><strong>class</strong></span></span><span style=\"color:black;\"><span> Circle&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>extends</strong></span></span><span style=\"color:black;\"><span> Shape {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>private</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>double</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span>radius</span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>Circle(</span><span style=\"color:#7F0055;\"><span><strong>double</strong></span></span><span style=\"color:black;\"><span>&nbsp;</span></span><span>radius</span><span style=\"color:black;\"><span>) {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span><strong>this</strong></span><span style=\"color:black;\"><span>.</span></span><span style=\"color:#0000C0;\"><span>radius</span></span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#6A3E3E;\"><span>radius</span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>@Override</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>double</strong></span><span style=\"color:black;\"><span> getArea() {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span><strong>return</strong></span><span style=\"color:black;\"><span> Math.</span></span><span style=\"color:#0000C0;\"><i><span><strong>PI</strong></span></i></span><span style=\"color:black;\"><span> *&nbsp;</span></span><span style=\"color:#0000C0;\"><span>radius</span></span><span style=\"color:black;\"><span> *&nbsp;</span></span><span style=\"color:#0000C0;\"><span>radius</span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:#7F0055;\"><span><strong>public</strong></span></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>class</strong></span><span style=\"color:black;\"><span> Test {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>static</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>void</strong></span><span style=\"color:black;\"><span> main(String[]&nbsp;</span></span><span style=\"color:#6A3E3E;\"><span>args</span></span><span style=\"color:black;\"><span>) {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span>Shape&nbsp;</span><span style=\"color:#6A3E3E;\"><span>shape</span></span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>new</strong></span></span><span style=\"color:black;\"><span> Circle(3.0);</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span>System.</span><span style=\"color:#0000C0;\"><i><span><strong>out</strong></span></i></span><span style=\"color:black;\"><span>.println(</span></span><span style=\"color:#6A3E3E;\"><span>shape</span></span><span style=\"color:black;\"><span>.getArea());</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>public</strong></span></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>class</strong></span><span style=\"color:black;\"><span> Test {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>static</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>void</strong></span><span style=\"color:black;\"><span> main(String[]&nbsp;</span></span><span style=\"color:#6A3E3E;\"><span>args</span></span><span style=\"color:black;\"><span>) {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span>Shape&nbsp;</span><span style=\"color:#6A3E3E;\"><span>shape</span></span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>new</strong></span></span><span style=\"color:black;\"><span> Circle(3.0);</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span class=\"apple-tab-span\"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span>System.</span><span style=\"color:#0000C0;\"><i><span><strong>out</strong></span></i></span><span style=\"color:black;\"><span>.println(</span></span><span style=\"color:#6A3E3E;\"><span>shape</span></span><span style=\"color:black;\"><span>.getArea());</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p class=\"MsoNormal\">&nbsp;</p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">9</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">28.274333882308138</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">12</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi biên dịch</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23647,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả đoạn chương trình sau là gì?</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\"> = {5, 10, 15};</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>for</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\"> = 0;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\"> &lt;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\">.</span><span style=\"background-color:transparent;color:#0000c0;\">length</span><span style=\"background-color:transparent;color:#000000;\">;&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">++) {</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.print(</span><span style=\"background-color:transparent;color:#6a3e3e;\">arr</span><span style=\"background-color:transparent;color:#000000;\">[</span><span style=\"background-color:transparent;color:#6a3e3e;\">i</span><span style=\"background-color:transparent;color:#000000;\">] +&nbsp;</span><span style=\"background-color:transparent;color:#2a00ff;\">\" \"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p style=\"text-align:justify;\" dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">5 10 15</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">5 10</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">10 15</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi biên dịch</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23661,
                    "question_number": 0,
                    "question_direction": "<p style=\"text-align:justify;\"><span style=\"color:black;\">Kết quả đoạn chương trình sau là gì?</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:#7F0055;\"><span><strong>import</strong></span></span><span style=\"color:black;\"><span> java.util.ArrayList;</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:#7F0055;\"><span><strong>public</strong></span></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>class</strong></span><span style=\"color:black;\"><span> Test {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>static</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>void</strong></span><span style=\"color:black;\"><span> main(String[]&nbsp;</span></span><span style=\"color:#6A3E3E;\"><span>args</span></span><span style=\"color:black;\"><span>) {</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>ArrayList&lt;String&gt;&nbsp;</span><span style=\"color:#6A3E3E;\"><span>list</span></span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>new</strong></span></span><span style=\"color:black;\"><span> ArrayList&lt;&gt;();</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>list</span><span style=\"color:black;\"><span>.add(</span></span><span style=\"color:#2A00FF;\"><span>\"Dog\"</span></span><span style=\"color:black;\"><span>);</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>list</span><span style=\"color:black;\"><span>.add(</span></span><span style=\"color:#2A00FF;\"><span>\"Cat\"</span></span><span style=\"color:black;\"><span>);</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>System.</span><span style=\"color:#0000C0;\"><i><span><strong>out</strong></span></i></span><span style=\"color:black;\"><span>.println(</span></span><span style=\"color:#6A3E3E;\"><span>list</span></span><span style=\"color:black;\"><span>.contains(</span></span><span style=\"color:#2A00FF;\"><span>\"Cat\"</span></span><span style=\"color:black;\"><span>));</span></span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p style=\"text-align:justify;\"><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p class=\"MsoNormal\">&nbsp;</p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">true&nbsp;</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">false</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi biên dịch</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi thực thi</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23677,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả của chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">numbers</span><span style=\"background-color:transparent;color:#000000;\"> = {1, 2, 3, 4, 5, 6};</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">sum</span><span style=\"background-color:transparent;color:#000000;\"> = 0;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>for</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">num</span><span style=\"background-color:transparent;color:#000000;\"> :&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">numbers</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>if</strong></span><span style=\"background-color:transparent;color:#000000;\"> (</span><span style=\"background-color:transparent;color:#6a3e3e;\">num</span><span style=\"background-color:transparent;color:#000000;\"> % 2 == 0) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#6a3e3e;\">sum</span><span style=\"background-color:transparent;color:#000000;\"> +=&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">num</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#6a3e3e;\">sum</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p>6</p>"
                        },
                        {
                            "id": "2",
                            "value": "<p>9</p>"
                        },
                        {
                            "id": "3",
                            "value": "<p>12</p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Chương trình bị lỗi biên dịch.</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23684,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả của chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Rectangle {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">length</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">width</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>Rectangle(</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">l</span><span style=\"background-color:transparent;color:#000000;\">,&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">w</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#0000c0;\">length</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">l</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#0000c0;\">width</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">w</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> area() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>return</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">length</span><span style=\"background-color:transparent;color:#000000;\"> *&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">width</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>Rectangle&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">r</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>new</strong></span><span style=\"background-color:transparent;color:#000000;\"> Rectangle(5, 10);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#6a3e3e;\">r</span><span style=\"background-color:transparent;color:#000000;\">.area());</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi thực thi.</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><span style=\"background-color:transparent;color:#000000;\">50</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p>15</p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi biên dịch.</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 23693,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả của chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Animal {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> eat() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Animal is eating\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Dog&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>extends</strong></span><span style=\"background-color:transparent;color:#000000;\"> Animal {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> bark() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Dog is barking\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Puppy&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>extends</strong></span><span style=\"background-color:transparent;color:#000000;\"> Dog {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> weep() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Puppy is weeping\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>Puppy&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">p</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>new</strong></span><span style=\"background-color:transparent;color:#000000;\"> Puppy();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#6a3e3e;\">p</span><span style=\"background-color:transparent;color:#000000;\">.eat();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#6a3e3e;\">p</span><span style=\"background-color:transparent;color:#000000;\">.bark();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#6a3e3e;\">p</span><span style=\"background-color:transparent;color:#000000;\">.weep();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Animal is eating\", \"Dog is barking\", và \"Puppy is weeping\".</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Puppy is weeping\".</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Chương trình không biên dịch.</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Dog is barking\" và \"Puppy is weeping\".</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                },
                {
                    "id": 23694,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả của chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Parent {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> display() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Display from Parent\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Child&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>extends</strong></span><span style=\"background-color:transparent;color:#000000;\"> Parent {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> display() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>super</strong></span><span style=\"background-color:transparent;color:#000000;\">.display();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Display from Child\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>Child&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">c</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>new</strong></span><span style=\"background-color:transparent;color:#000000;\"> Child();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#6a3e3e;\">c</span><span style=\"background-color:transparent;color:#000000;\">.display();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Display from Parent\" và \"Display from Child\".</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Display from Child\".</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Display from Parent\".</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Chương trình không biên dịch.</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                },
                {
                    "id": 23697,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả của chương trình sau là gì?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Person {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>String&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">name</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">age</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>Person(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">n</span><span style=\"background-color:transparent;color:#000000;\">,&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">a</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#0000c0;\">name</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">n</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#0000c0;\">age</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">a</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\"> String toString() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>return</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">name</span><span style=\"background-color:transparent;color:#000000;\"> +&nbsp;</span><span style=\"background-color:transparent;color:#2a00ff;\">\", \"</span><span style=\"background-color:transparent;color:#000000;\"> +&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">age</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Test {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span></span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static</strong></span><span style=\"background-color:transparent;color:#000000;\">&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> main(String[]&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">args</span><span style=\"background-color:transparent;color:#000000;\">) {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>Person&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">p</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>new</strong></span><span style=\"background-color:transparent;color:#000000;\"> Person(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Alice\"</span><span style=\"background-color:transparent;color:#000000;\">, 25);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>System.</span><span style=\"background-color:transparent;color:#0000c0;\"><i><strong>out</strong></i></span><span style=\"background-color:transparent;color:#000000;\">.println(</span><span style=\"background-color:transparent;color:#6a3e3e;\">p</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"Apple-tab-span\"> </span>}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">}</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Alice\".</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"25\".</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"Alice, 25\".</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Chương trình không biên dịch.</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                },
                {
                    "id": 23699,
                    "question_number": 0,
                    "question_direction": "<p><span style=\"color:black;\">Kết quả của chương trình sau là gì?</span><o:p></o:p></p><p><span style=\"color:#7F0055;\"><span><strong>class</strong></span></span><span style=\"color:black;\"><span> LibraryBook {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>private</strong></span><span style=\"color:black;\"><span> String </span></span><span style=\"color:#0000C0;\"><span>title</span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>private</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>boolean</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span>isCheckedOut</span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span> LibraryBook(String&nbsp;</span></span><span style=\"color:#6A3E3E;\"><span>t</span></span><span style=\"color:black;\"><span>) {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>title</span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#6A3E3E;\"><span>t</span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>isCheckedOut</span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>false</strong></span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>void</strong></span><span style=\"color:black;\"><span> checkOut() {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>isCheckedOut</span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>true</strong></span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>void</strong></span><span style=\"color:black;\"><span> returnBook() {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>isCheckedOut</span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>false</strong></span></span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>boolean</strong></span><span style=\"color:black;\"><span> isCheckedOut() {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>return</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span>isCheckedOut</span><span style=\"color:black;\"><span>;</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p><span style=\"color:#7F0055;\"><span><strong>public</strong></span></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>class</strong></span><span style=\"color:black;\"><span> Test {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span><strong>public</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>static</strong></span><span style=\"color:black;\"><span>&nbsp;</span></span><span><strong>void</strong></span><span style=\"color:black;\"><span> main(String[] </span></span><span style=\"color:#6A3E3E;\"><span>args</span></span><span style=\"color:black;\"><span>) {</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>LibraryBook&nbsp;</span><span style=\"color:#6A3E3E;\"><span>book</span></span><span style=\"color:black;\"><span> =&nbsp;</span></span><span style=\"color:#7F0055;\"><span><strong>new</strong></span></span><span style=\"color:black;\"><span> LibraryBook(</span></span><span style=\"color:#2A00FF;\"><span>\"Java Programming\"</span></span><span style=\"color:black;\"><span>);</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>book</span><span style=\"color:black;\"><span>.checkOut();</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>System.</span><span style=\"color:#0000C0;\"><i><span><strong>out</strong></span></i></span><span style=\"color:black;\"><span>.println(</span></span><span style=\"color:#6A3E3E;\"><span>book</span></span><span style=\"color:black;\"><span>.isCheckedOut());</span></span><o:p></o:p></p><p><span style=\"color:black;\"><span class=\"apple-tab-span\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span>}</span><o:p></o:p></p><p><span style=\"color:black;\"><span>}</span></span><o:p></o:p></p><p class=\"MsoNormal\">&nbsp;</p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"true\".</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">In ra \"false\".</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi thực thi.</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi biên dịch.</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                }
            ]
        }
    ]
}