Question

When an element is added to a queue, where is it added?

Short answer

Answer: When an element is enqueued to a queue, it is added to the rear (back) of the queue.

Step-by-step solution

Understanding a Queue

A queue is a data structure that follows the First In, First Out (FIFO) principle, meaning that the first element added to the queue will be the first one to be removed. Elements in the queue are removed from the front, and new elements are added to the back.

Enqueue - Adding Elements to the Queue

When an element is added to a queue, it is added to the back or rear of the queue. This operation is called enqueue. This ensures that all elements are placed in the order in which they were added, following the FIFO principle.

Example of Enqueue

Suppose you have a queue with elements A, B, and C (front to rear): Front [ A - B - C ] Rear If you enqueue() a new element D, it will be added to the rear of the queue: Front [ A - B - C - D ] Rear