Question

Arid No is 19-arid-898

Question 3:                  [2+2]

a) What, to whom and how many values a fork system call returns?

 

b) Assuming there is no syntax error, what is the output for the following C program for linux? All of you may need to put screenshot of your PC in which Terminal login must be your arid number.

int main()

{      pid_t  fork_return;

        fork_return = fork();

 if (fork_return == 0) {

                 execlp("/bin/ls", "ls", NULL);

                 printf("Child process ID: %d\n", getpid());

      exit(0);

        }

        else { wait (NULL);

                 printf("Parent process ID: %d\n", getpid());

         }

     return 0;

}