Which of the following data structures is best suited for implementing a circular queue?

Answer:

Explanation:

A circular queue is best implemented using an array. In a circular queue, the positions in the array are reused by wrapping around when the end of the array is reached. This allows for efficient use of space and prevents the need to shift elements.

In a normal queue, once the end of the array is reached, no more elements can be inserted, even if there are free spaces at the beginning. A circular queue overcomes this limitation by linking the end of the array back to the beginning.

Both enqueue and dequeue operations in a circular queue take constant time O(1), making it an efficient data structure for scenarios where a fixed-size buffer is required.