NPTEL

Question

1 point

The variable turn can have values 0 or 1

  Void Process (i)

     {

     while(1)

        {

          //Non-critical section

           While (turn!=i);

                //     Critical section

            turn = j;

        }

}

The above code does not provide

 1. Mutual exclusion

 2. Progress

 3. Bounded wait

 4. None of these

Answer 1

1.ME-true ,because only turn can have value either 0 or 1 which ensure ME

2-Progress-False, because let suppose  turn =1 for process j but j dont want to critical section whereas i wants to enter but it has to wait for j

3.Bounded Waiting-true, Because no other can enter into critical section more than once continuously as turn value is changing after critical section

so answer is B