Question: 8. What is the output of this program?<div class="hk1_style-wrap4"><div class="hk1_style-wrap3"><div class="hk1_style-wrap2"><div class="hk1_style-wrap"><div class="hk1_style"><div class="c"><ol><li class="li1"><pre class="de1"> <span class="co2">#include&lt;stdio.h&gt;</span></pre></li><li class="li1"><pre class="de1"> <span class="co2">#include&lt;stdlib.h&gt;</span></pre></li><li class="li1"><pre class="de1"> <span class="co2">#include&lt;netinet/in.h&gt;</span></pre></li><li class="li1"><pre class="de1"> <span class="co2">#include&lt;sys/types.h&gt;</span></pre></li><li class="li1"><pre class="de1"> <span class="co2">#include&lt;sys/socket.h&gt;</span></pre></li><li class="li1"><pre class="de1">&nbsp;</pre></li><li class="li1"><pre class="de1"> <span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span></pre></li><li class="li1"><pre class="de1"> <span class="br0">{</span></pre></li><li class="li1"><pre class="de1"> <span class="kw4">int</span> fd_server<span class="sy0">,</span> fd_client<span class="sy0">,</span> len<span class="sy0">,</span> len_client<span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw4">struct</span> sockaddr_in add_server<span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> fd_server <span class="sy0">=</span> socket<span class="br0">(</span>AF_INET<span class="sy0">,</span>SOCK_STREAM<span class="sy0">,</span><span class="nu0">0</span><span class="br0">)</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> close<span class="br0">(</span>fd_server<span class="br0">)</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw3">perror</span><span class="br0">(</span><span class="st0">"accept"</span><span class="br0">)</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw1">if</span><span class="br0">(</span>listen<span class="br0">(</span>fd_server<span class="sy0">,</span><span class="nu0">5</span><span class="br0">)</span> <span class="sy0">!=</span> <span class="nu0">0</span><span class="br0">)</span></pre></li><li class="li1"><pre class="de1"> <span class="kw3">perror</span><span class="br0">(</span><span class="st0">"listen"</span><span class="br0">)</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> fd_client <span class="sy0">=</span> accept<span class="br0">(</span>fd_server<span class="sy0">,</span><span class="br0">(</span><span class="kw4">struct</span> sockaddr<span class="sy0">*</span><span class="br0">)</span><span class="sy0">&amp;</span>add_server<span class="sy0">,&amp;</span>len<span class="br0">)</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw1">if</span><span class="br0">(</span>fd_client <span class="sy0">==</span> <span class="sy0">-</span><span class="nu0">1</span><span class="br0">)</span></pre></li><li class="li1"><pre class="de1"> <span class="kw1">return</span> <span class="nu0">0</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="br0">}</span></pre></li></ol></div></div></div></div></div></div>
Options:
syntax error
error at the time of compilation
segmentation fault
none of the mentioned
Answer: D