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;

}