A circular queue has been implemented using a singly linked list where each node consists of a value and a single pointer pointing to the next node. We maintain exactly two external pointers FRONT and REAR pointing to the front node and the rear node of the queue, respectively. Which of the following statements is/are CORRECT for such a circular queue, so that insertion and deletion operations can be performed in O(1)O(1) time?
(I) Next pointer of front node points to the rear node.
(II) Next pointer of rear node points to the front node.
(A) (I) only.
(B) (II) only.
(C) Both (I) and (II).
(D) Neither (I) nor (II).
I feel whatever be the order of the rear and front pointer it doesnt matter .....it will be O(1) for deletion and insertion
But the key says only B is right
would be helpful if someone explains this one