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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