OS-question

Question

if c has value =0 initially ....i am getting MAX=2 and minimum =-2..is it correct??

Comments

Yes max =2 and min = -2 is correct.

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Question is not well framed...dont solve these type of questions...solve previous year papers

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All processes perform their update under semaphore control.

Does it mean that the processs are synchronized? Because if is so, then I think we must not consider any race condition.

Answer 1

yes, max =2 and min=-2

bcz,counting semaphore can take any integer value up to the number of process that can enter into critical section or leave the critical section.

that is why here semaphore value max=2 and min =-2(i.e in first case two process entering critical section and in second case two process leaving critical section).