Question: 3. 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;pthread.h&gt;</span></pre></li><li class="li1"><pre class="de1"> <span class="co2">#include&lt;semaphore.h&gt;</span></pre></li><li class="li1"><pre class="de1">&nbsp;</pre></li><li class="li1"><pre class="de1"> sem_t st<span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw4">void</span> <span class="sy0">*</span>fun_t<span class="br0">(</span><span class="kw4">void</span> <span class="sy0">*</span>arg<span class="br0">)</span><span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw4">void</span> <span class="sy0">*</span>fun_t<span class="br0">(</span><span class="kw4">void</span> <span class="sy0">*</span>arg<span class="br0">)</span></pre></li><li class="li1"><pre class="de1"> <span class="br0">{</span></pre></li><li class="li1"><pre class="de1"> pthread_exit<span class="br0">(</span><span class="st0">"Bye"</span><span class="br0">)</span><span class="sy0">;</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> 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"> pthread_t pt<span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw4">void</span> <span class="sy0">*</span>res_t<span class="sy0">;</span></pre></li><li class="li1"><pre class="de1"> <span class="kw1">if</span><span class="br0">(</span>pthread_create<span class="br0">(</span><span class="sy0">&amp;</span>pt<span class="sy0">,</span>NULL<span class="sy0">,</span>fun_t<span class="sy0">,</span>NULL<span class="br0">)</span> <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="kw3">perror</span><span class="br0">(</span><span class="st0">"pthread_create"</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>sem_init<span class="br0">(</span>st<span class="sy0">,</span><span class="nu0">1</span><span class="sy0">,</span><span class="nu0">2</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">"sem_init"</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>pthread_join<span class="br0">(</span>pt<span class="sy0">,&amp;</span>res_t<span class="br0">)</span> <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="kw3">perror</span><span class="br0">(</span><span class="st0">"pthread_join"</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>sem_destroy<span class="br0">(</span><span class="sy0">&amp;</span>st<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">"sem_destroy"</span><span class="br0">)</span><span class="sy0">;</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:
this program will print nothing
this program will give an error
this program will give segmentation fault
none of the mentioned
Answer: B