Why is C not true?
On Sun, Jun 19, 2011 at 6:31 PM, sanjay ahuja <sanjayahuja.i...@gmail.com>wrote:
> B and D are true
>
>
> On Sun, Jun 19, 2011 at 5:43 PM, Nishant Mittal
> <mittal.nishan...@gmail.com> wrote:
> > It does not prevent deadlock so i think (D) is definitely true.
> >
> > On Sun, Jun 19, 2011 at 5:15 PM, Akshata Sharma <
> akshatasharm...@gmail.com>
> > wrote:
> >>
> >> Two processes, P1 and P2, need to access a critical section of code.
> >> Consider the following synchronization construct used by the processes:
> >>
> >> /* P1 */
> >> while (true) {
> >> wants1 = true;
> >> while (wants2==true);
> >> /* Critical Section */
> >> wants1=false;
> >> }
> >> /* Remainder section */
> >>
> >> /* P2 */
> >> while (true) {
> >> wants2 = true;
> >> while (wants1==true);
> >> /* Critical Section */
> >> Wants2=false;
> >> }
> >> /* Remainder section */
> >>
> >> Here, wants1 and wants2 are shared variables, which are initialized to
> >> false. Which one of the following statements is TRUE about the above
> >> construct?
> >> (A) It does not ensure mutual exclusion.
> >> (B) It does not ensure bounded waiting.
> >> (C) It requires that processes enter the critical section in strict
> >> alternation.
> >> (D) It does not prevent deadlocks, but ensures mutual exclusion.
> >>
> >> I think B,C are true. It also prevents deadlock so D is also true, not
> >> sure though. Am I right?
> >>
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>
>
> --
> Sanjay Ahuja,
> Analyst, Financing Prime Brokerage
> Nomura Securities India Pvt. Ltd
>
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