Question: What is a Semaphore? Give an implementation in pseudo code for semaphore wait ( P ) and signal ( V ) operations which do not

What is a Semaphore? Give an implementation in pseudo code for semaphore wait (P) and
signal (V) operations which do not incur busy waiting and demonstrate how semaphores
can then be used for general synchronisation purposes.
What is a Semaphore? Give an implementation in pseudo code for

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