Programming

Question

Consider the following code to reverse the elements of the Queue

Which of the following is a correct sequence of A,B,C?

1.   temp=dequeue(Queue);
   enqueue(temp,Queue);
   Reverse(Queue);
2.  Reverse(dequeue(Queue));
   temp=dequeue(Queue); 
   enqueue(temp,Queue);
3.   temp=dequeue(Queue);
   Reverse(Queue);
   enqueue(temp,Queue);

Answer 1

option 3

Comments

why option 2 is not right, can u explain?

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just dry run  the 2nd option as i have done.

you will find it why it is wrong..

Answer 2

Right ans is Option 3
Option 2 is wrong because in reverse(dequeue(queue)) we are passing a single data not  queue

Comments

thank you :)