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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
22. A counting semaphore is initialized to 15. Then, 4 wait operations and 2 signal operations are completed on this semaphore. The resulting value of the semaphore is ____________.
(A) 11 (B) 13 (C) 17 (D) 19
Solution
Explanation: Each wait (P) decrements; each signal (V) increments.
Initial: 15 → after 4 waits: 11 → after 2 signals: 13.
$$ 15 - 4 + 2 = 13 $$
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