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At a particular time of ocmputation the value of a counting semaphore is 7. Then 20 P operations and 15 V operation were completed on this semaphore. The resulting value of the semaphore is
  • a)
    42
  • b)
    2
  • c)
    7
  • d)
    12
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
At a particular time of ocmputation the value of a counting semaphore ...
Number of wait process = 20 i.e. decrement Number of signal process = 15 i.e. increment Therefore value of semaphore at the end of program execution
= Initial value - Number of P(C) + Number of V(C)
= 7 - 20 + 15 = 2
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Most Upvoted Answer
At a particular time of ocmputation the value of a counting semaphore ...
Explanation:

Initial Value of Semaphore:
- The initial value of the counting semaphore is 7.

P Operations:
- 20 P operations were completed on the semaphore.
- Each P operation decrements the value of the semaphore by 1.

V Operations:
- 15 V operations were completed on the semaphore.
- Each V operation increments the value of the semaphore by 1.

Calculation:
- Total P operation decrements the semaphore value by 20. (7 - 20 = -13)
- Total V operation increments the semaphore value by 15. (-13 + 15 = 2)

Resulting Value of Semaphore:
- The resulting value of the semaphore after 20 P operations and 15 V operations is 2.
Therefore, the correct answer is option B) 2.
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At a particular time of ocmputation the value of a counting semaphore is 7. Then 20 P operations and 15 V operation were completed on this semaphore. The resulting value of the semaphore isa)42b)2c)7d)12Correct answer is option 'B'. Can you explain this answer?
Question Description
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