GATE 2012 CS (CS1) – Question 18

Operating System · System Calls, Processes, Threads and IPC · 1 mark · Multiple choice

A process executes fork(); fork(); fork();. How many child processes are created?

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Correct answer: (C) 7

Explanation

Every successful fork doubles the number of active processes, so three successive calls across all descendants produce 2³=8 total processes. Excluding the original parent leaves seven children, C. This assumes all forks succeed.

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