Chapter 18: Problem 10

When an element is removed from a queue, where is it removed from?

Short Answer

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**Answer**: The main characteristic of a queue data structure is its adherence to the First In First Out (FIFO) principle, meaning the element that enters first is the one that gets removed first. In a queue, elements are removed from the front during a dequeue operation.

Step by step solution

Introduction to Queue Data Structure

A queue is a linear data structure that follows the First In First Out (FIFO) principle, which means that the element that enters first is the one that gets removed first. It has two main operations: enqueue (adding an element to the end of the queue) and dequeue (removing an element from the front of the queue). Think of a queue like a real-life queue or line, such as standing in line at a grocery store checkout.

The dequeue operation: Removing Elements from a Queue

When an element is removed from a queue, it is removed from the front. The front is the position where the first element was added to the queue and has been waiting the longest to be removed. Now, let's illustrate this with an example.

Example: Removing Elements from a Queue

Suppose we have a queue containing the following elements: [10, 20, 30, 40, 50]. The element at the front is 10, and the element at the rear is 50. When a dequeue operation is performed, the element that gets removed is the one at the front: 1. Dequeue operation: Remove 10 (front element) New queue: [20, 30, 40, 50] 2. Dequeue operation: Remove 20 (front element) New queue: [30, 40, 50] As illustrated, dequeue operations remove elements from the front of the queue, maintaining the FIFO principle.

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When an element is removed from a queue, where is it removed from?

Short Answer

Step by step solution

Introduction to Queue Data Structure

The dequeue operation: Removing Elements from a Queue

Example: Removing Elements from a Queue

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