in ra  câu trả lời  {
                    "id": 14801,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Làm thế nào để khai báo một lớp trong java thuộc một gói cụ thể?</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Sử dụng từ khóa&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>import</strong></span><span style=\"background-color:transparent;color:#000000;\"> để chỉ định gói.</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Đặt lớp trong thư mục có tên gói.</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Dùng từ khóa&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>package</strong></span><span style=\"background-color:transparent;color:#000000;\"> trước định nghĩa lớp.</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Không cần làm gì, java tự động quản lý các gói.</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 14822,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">1. Trong ngữ cảnh kế thừa, phương thức nào dưới đây có thể được ghi đè trong lớp con?</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Phương thức&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>private</strong></span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Phương thức&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>static final</strong></span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Phương thức&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>final</strong></span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Phương thức&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>non-static</strong></span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 2,
                    "code": ""
                },
                {
                    "id": 14867,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết quả khi chạy 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;\"> X {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>&nbsp; &nbsp;void</strong></span><span style=\"background-color:transparent;color:#000000;\"> print() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp; &nbsp; &nbsp; &nbsp;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;\">\"X\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp; &nbsp;}</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;\"> Y&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>extends</strong></span><span style=\"background-color:transparent;color:#000000;\"> X {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>void</strong></span><span style=\"background-color:transparent;color:#000000;\"> print() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;\">\"Y\"</span><span style=\"background-color:transparent;color:#000000;\">);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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; </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;Y&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">obj</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;\"> Y();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style=\"background-color:transparent;color:#6a3e3e;\">obj</span><span style=\"background-color:transparent;color:#000000;\">.print();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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;\">X</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Y</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">X Y&nbsp;</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Compile-time error</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                },
                {
                    "id": 14947,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Khi&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">gọi</span><span style=\"background-color:transparent;color:#000000;\"> phương thức add(5, 3) trong chương trình sau, phương thức nào sẽ được thực hiện?</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#7f0055;\"><strong>class</strong></span><span style=\"background-color:transparent;color:#000000;\"> Calculator {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </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>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> add(</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;\">,&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;\">b</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; </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:#6a3e3e;\">a</span><span style=\"background-color:transparent;color:#000000;\"> +&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">b</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </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>double</strong></span><span style=\"background-color:transparent;color:#000000;\"> add(</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;\">a</span><span style=\"background-color:transparent;color:#000000;\">,&nbsp;</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;\">b</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; </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:#6a3e3e;\">a</span><span style=\"background-color:transparent;color:#000000;\"> +&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">b</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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;\">Phương thức add(</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> a,&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> b)</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Phương thức add(</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>double</strong></span><span style=\"background-color:transparent;color:#000000;\"> a,&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>double</strong></span><span style=\"background-color:transparent;color:#000000;\"> b)</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Không có phương thức add phù hợp</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Có lỗi biên dịch</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                },
                {
                    "id": 14963,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">quả</span><span style=\"background-color:transparent;color:#000000;\"> của đoạn mã&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">sau&nbsp;</span><span style=\"background-color:transparent;color:#000000;\">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;\"> Calculator {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </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>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> add(</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;\">,&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;\">b</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; </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:#6a3e3e;\">a</span><span style=\"background-color:transparent;color:#000000;\"> +&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">b</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </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>double</strong></span><span style=\"background-color:transparent;color:#000000;\"> add(</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;\">a</span><span style=\"background-color:transparent;color:#000000;\">,&nbsp;</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;\">b</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; </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:#6a3e3e;\">a</span><span style=\"background-color:transparent;color:#000000;\"> +&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">b</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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; </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;Calculator&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">calc</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;\"> Calculator();</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;\">calc</span><span style=\"background-color:transparent;color:#000000;\">.add(5, 5));</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;\">calc</span><span style=\"background-color:transparent;color:#000000;\">.add(5.5, 5.5));</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">10</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">11.0</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">10.0</span></p><p><span style=\"background-color:transparent;color:#000000;\">11.0</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">10</span></p><p><span style=\"background-color:transparent;color:#000000;\">10.0</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": ""
                },
                {
                    "id": 14974,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Kết&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">quả</span><span style=\"background-color:transparent;color:#000000;\"> của đoạn mã&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">sau&nbsp;</span><span style=\"background-color:transparent;color:#000000;\">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; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>private</strong></span><span style=\"background-color:transparent;color:#000000;\"> 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; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\"> Person(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">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; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>this</strong></span><span style=\"background-color:transparent;color:#000000;\">.</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;\">name</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\"> String getName() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </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;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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;\"> Student&nbsp;</span><span style=\"background-color:transparent;color:#7f0055;\"><strong>extends</strong></span><span style=\"background-color:transparent;color:#000000;\"> Person {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>private</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;\">&nbsp;</span><span style=\"background-color:transparent;color:#0000c0;\">studentId</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>public</strong></span><span style=\"background-color:transparent;color:#000000;\"> Student(String&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">name</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;\">id</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; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>super</strong></span><span style=\"background-color:transparent;color:#000000;\">(</span><span style=\"background-color:transparent;color:#6a3e3e;\">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; </span><span style=\"background-color:transparent;color:#7f0055;\"><strong>this</strong></span><span style=\"background-color:transparent;color:#000000;\">.</span><span style=\"background-color:transparent;color:#0000c0;\">studentId</span><span style=\"background-color:transparent;color:#000000;\"> =&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">id</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp; </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>int</strong></span><span style=\"background-color:transparent;color:#000000;\"> getStudentId() {</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </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;\">studentId</span><span style=\"background-color:transparent;color:#000000;\">;</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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; </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;Student&nbsp;</span><span style=\"background-color:transparent;color:#6a3e3e;\">student</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;\"> Student(</span><span style=\"background-color:transparent;color:#2a00ff;\">\"Alice\"</span><span style=\"background-color:transparent;color:#000000;\">, 123);</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;\">student</span><span style=\"background-color:transparent;color:#000000;\">.getName());</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;\">student</span><span style=\"background-color:transparent;color:#000000;\">.getStudentId());</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;&nbsp;&nbsp;}</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\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">Alice</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">123</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Lỗi biên dịch</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Alice và Lỗi biên dịch</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">123</span></p><p dir=\"ltr\"><span style=\"background-color:transparent;color:#000000;\">&nbsp;Alice</span></p>"
                        }
                    ],
                    "shuff": null,
                    "part": 0,
                    "group_id": 0,
                    "media": null,
                    "config": {
                        "cols": 2,
                        "invertedAnswer": true
                    },
                    "skill": null,
                    "cdr": 3,
                    "code": ""
                },
                {
                    "id": 15023,
                    "question_number": 0,
                    "question_direction": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Trong Java, khi sử dụng phương thức viết đè, lớp con có thể:</span></p>",
                    "question_type": "radio",
                    "answer_option": [
                        {
                            "id": "1",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Thay đổi tên phương thức</span></p>"
                        },
                        {
                            "id": "2",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Thay đổi kiểu dữ liệu trả về</span></p>"
                        },
                        {
                            "id": "3",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Thay đổi số lượng tham số</span></p>"
                        },
                        {
                            "id": "4",
                            "value": "<p><meta charset=\"utf-8\"><span style=\"background-color:transparent;color:#000000;\">Thay đổi nội dung phương thức mà vẫn giữ nguyên tên, kiểu dữ liệu trả về và số lượng tham số</span></p>"
                        }
                    ],