A counting semaphore was initialized to 10. Then 6 P (wait) operations and 4 V (signal) operations were completed on thi...

Question

A counting semaphore was initialized to 10. Then 6 P (wait) operations and 4 V (signal) operations were completed on this semaphore. The resulting value of the semaphore is:
A. 0
B. 8
C. 10
D. 12

Accepted Answer

The resulting value of the semaphore is 8. (Answer: B) A counting semaphore is initialized to 10. We apply 6 wait (P/decrement) operations and 4 signal (V/increment) operations. The final value is computed by subtracting the number of P operations and adding the number of V operations to the initial value.

A counting semaphore was initialized to 10. Then 6 P (wait) operations and 4 V (signal) operations were completed on this semaphore. The resulting value of the semaphore is: A. 0 B. 8 C. 10 D. 12