Operating Systems · Question 9 · Medium
Operating Systems question 9
A counting semaphore S is initialised to 8. Then 11 wait (P) operations and 5 signal (V) operations are performed on it. What is the final value of S?
- 2
- -3
- 13
- 0
Answer and explanation
Answer: A. 2
Explanation: Each wait decrements S by 1 and each signal increments it by 1, so the final value is 8 - 11 + 5 = 2.
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