GATE 2023 | OS | COUNTING BINARY SEMAPHORE | GATE TEST SERIES | SOLUTIONS ADDA | EXPLAINED BY VIVEK
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Загружено: 2023-02-19
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GATE 2023 Q38: consider the two functions incr and decr shown below.
There are 5 threads each invoking incr once, and 3 threads each invoking decr once, on the same shared variable X. The initial value of X is 10.
Suppose there are two implementations of the semaphore s, as follows:
I-1: s is a binary semaphore initialized to 1.
I-2: s is a counting semaphore initialized to 2.
Let V1, V2 be the values of X at the end of execution of all the threads with implementations I-1, I-2, respectively.
Which one of the following choices corresponds to the minimum possible values of V1, V2, respectively?
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