Question: Suppose a semaphore is initialized to 0 , and a process calls sem _ wait on it . What will happen to the semaphore and

Suppose a semaphore is initialized to 0, and a process calls sem_wait on it. What will happen to the semaphore and the process?
the semaphore will have value -1, and the process will block
the semaphore will have value -1, and the process will not block
the semaphore will have value 0, and the process will block
the semaphore will have value 0, and the process will not block

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