Question

If the semaphore value is negative ____________

(a) its magnitude is the number of processes waiting on that semaphore

(b) it is invalid

(c) no operation can be further performed on it until the signal operation is performed on it

(d) none of the mentioned

I got this question by my college professor while I was bunking the class.

The above asked question is from Semaphores in portion Process Synchronization of Operating System

Answer 1

Right choice is (a) its magnitude is the number of processes waiting on that semaphore

To explain: None.