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If the value of a counting semaphore s = 4, then the maximum number of requests for the critical section before it blocks is _____________ ?

1.   0

2.   1

3.   2

4.   4
in Operating System by (255 points) | 182 views

3 Answers

+1 vote
4 request for cs can be granted
by Junior (807 points)
+1 vote
Ans is 4

since the counting semaphore will decrease the count for every requesting process until it gets to 0...afterwards it will block the next requesting processes.
by (277 points)
+1 vote
you can apply 4 successful down operation on this semaphore. The next down opeartion will be unsuccessful and the process will get blocked.
by (133 points)
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