Basic Computer Knowledge Test Questions and Answers

Linux Debugging Questions & Answers – Internet Domain Socket System Calls

1.

What is the output of this program?


   #include
   #include
   #include
 
   int main()
   {
       struct sockaddr_in addr;
       int fd;
       fd = socket(AF_INET,SOCK_STREAM,0);
       printf("%d\n",fd);
       return 0;
   }

   A.) -1
   B.) 3
   C.) error
   D.) none of these

Answer: Option 'C'

The header file netinet/in.h is required to use the structure sockaddr_in.
Output:
[root@localhost sanfoundry]# gcc -o san san.c
san.c: In function ‘main’:
san.c:7:21: error: storage size of ‘addr’ isn’t known
[root@localhost sanfoundry]#

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