What does the following ‘xv6‘ code snippet accomplish? int pid; pid = fork(); if (pid == 0) { execlp("ls", "ls", "-l", NULL); exit(0); } else if (pid > 0) { int status; wait(&status); }

(B) The child process executes the ‘ls -l‘ command, and the parent process waits for it to complete.

(A) Both the parent and child processes execute the ‘ls‘ command concurrently.

(C) The parent process executes the ‘ls -l‘ command, and the child process terminates.

Operating Systems · Quiz 1 · 23 Feb 2025 · January 2025 term

Question 3: What does the following ‘xv6‘ code snippet accomplish?

Question 3

+3 marksOne correct option

What does the following ‘xv6‘ code snippet accomplish?

1int pid;
2
3pid = fork();
4if (pid == 0) {
5    execlp("ls", "ls", "-l", NULL);
6    exit(0);
7} else if (pid > 0) {
8    int status;
9    wait(&status);
10}

A
Both the parent and child processes execute the ‘ls‘ command concurrently.
B
The child process executes the ‘ls -l‘ command, and the parent process waits for it to complete.
C
The parent process executes the ‘ls -l‘ command, and the child process terminates.
D
None of these

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Correct answer

B
The child process executes the ‘ls -l‘ command, and the parent process waits for it to complete.

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Question 3 of 19 in the IIT Madras BS Operating Systems (Operating Systems) Quiz 1 paper sat on 23 Feb 2025, in the January 2025 term (IIT M IMPROVEMENT AN EXAM QIM2 23 Feb 2025). It carries 3 marks.

Question 3: What does the following ‘xv6‘ code snippet accomplish?

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