Question: In a simple implementation of sem wait(), when would it have to perform a system call: Never When the semaphore's value is 0 On a

In a simple implementation of sem wait(), when would it have

In a simple implementation of sem wait(), when would it have to perform a system call: Never When the semaphore's value is 0 On a page miss Once Every time it's called - When the semaphore's value is nonzero -On an exception More than once per call

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