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Chapter 18: Problem 8

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

Short Answer

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

Step by step solution

01

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.
02

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.
03

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

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Most popular questions from this chapter

The STL stack is considered a container adapter. What does that mean?

A common real-life example used to explain stacks is the stack of plates in a cafeteria. Find at least two other real-life examples in which items are added and removed from a container in last-in-first-out order, and use these examples to explain the concept of a stack.

Suppose the following operations are performed on an empty queue: enqueue (5) enqueue (7) dequeue () enqueue (9) enqueue (12) dequeue () enqueue (10) Insert numbers in the following diagram to show what will be stored in the static queue after the operations have executed.

What types may the STL stack be based on? By default, what type is an STL stack based on?

What element is retrieved from a stack by the pop operation?
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