Grokking Data Structures & Algorithms for Coding Interviews
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Types of Queue

Queues come in different variations based on how elements are inserted, removed, and prioritized. While all queues follow the First-In, First-Out (FIFO) principle, some variations modify the insertion and removal rules to suit different use cases.

Let’s explore the main types of queues and understand their applications.

1. Simple Queue (Linear Queue)

A simple queue is the most basic form of a queue. It follows the FIFO (First-In, First-Out) rule, meaning:

  • New elements are added at the rear.
  • Elements are removed from the front.

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ethanedge

· a month ago

The introduction states "While all queues follow the First-In, First-Out (FIFO) principle" but then Deques and Priority Queues are mentioned and described as NOT being FIFO.