GATE CSE · 2021 · CS
Question 46: Operating System
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Question 46
CSMSQ2 marksNeeds review
Consider the following pseudocode, where S is a semaphore initialized to 5 in line#2 and counter is a shared variable initialized to 0 in line#1. Assume that the increment operation in line#7 is not atomic.
int counter = 0;
Semaphore S = init(5);
void parop(void)
{
wait(S);
wait(S);
counter++;
signal(S);
signal(S);
}
If five threads execute the function parop concurrently, which of the following program behavior(s) is/are possible?
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2021CS
GATE CSE 2021 · Paper 1
Computer Science and Information Technology · Original paper archive
- Section
- Computer Science and Information Technology
- Question type
- Multiple select (MSQ)
- Marks
- 2 marks
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