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UGC NET CSE | July 2018 | Part 2 | Question: 51

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At a particular time of computation, the value of a counting semaphore is 10. Then 12 P operations and "x" V operations were performed on this semaphore. If the final value of semaphore is 7, x will be

  1. 8
  2. 9
  3. 10
  4. 11
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1 Answer

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Current value of CS=10

CS-12+X=7

X=7+12-10=9

Option (2) is correct.
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from whr we get this formula??
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