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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
At a particular time of computation, the value of a counting semaphore is 7. Then 20 P operations and x V operations were completed on this semaphore. If the final value of semaphore is 5, x will be
Solution
Initial semaphore value = 7
Each P operation decreases the value by 1.
Each V operation increases the value by 1.
So,
$7 - 20 + x = 5$
$x - 13 = 5$
$x = 18$
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