Question

A parent process calling _____ system call will be suspended until children processes terminate.

(a) wait

(b) fork

(c) exit

(d) exec

The question was asked in a national level competition.

I need to ask this question from Process Creation in section Processes of Operating System

Answer 1

Right answer is (a) wait

To explain I would say: A parent process calling wait system call will be suspended until children processes terminate. A parameter is passed to wait system call which will obtain exit status of child as well as wait system call returns PID of terminated process.