SemaPhore

Question

Answer 1

A binary semphore which allows only one process into critical section can take a value 0 or 1 at any point of time. The question ask which value it is intialized to which is obviously one.

Comments

Binary Semaphore only two value 0,1  p1 in cs n =1 ,NOW p2 enter n=2 and we use Binary Semaphore  so p2 can't be enter.

                                                                       v(n)   n=0   for p1,p2
                                                                       cs
                                                                       p(n)

@Kaushik.P.E  

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ya the value will be 1. isn't this code for P2 in your comment.

 p(n)        n=1 for p1,p2   

 cs
 v(n)

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this is a very simple question. be open minded you'll get it.

If you're trying to mean that the first section is the code for both p1 and p2. Then signalling a binary semphore whose value is already 1 will not pause the execution of P2.