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Semaphores are mostly used to implement ____________

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Semaphores are mostly used to implement ____________

(a) System calls

(b) IPC mechanisms

(c) System protection

(d) None of the mentioned

I have been asked this question during an internship interview.

I want to ask this question from Semaphores topic in section Process Synchronization of Operating System

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Right option is (b) IPC mechanisms

The explanation: None.

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