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DSA / Data Structures / Queue

Queue

371+ posts

Fill and Empty a Queue

Last Updated: 04 April 2025

Given an empty queue and an array of elements, we need to perform the following two operations.1. Filling a QueueFilling a queue refers to the process of adding array elem...read more

Data Structures

Top Problems on Deque Data Structure asked in SDE Interviews

Last Updated: 16 March 2025

A Deque (Double-Ended Queue) is a flexible data structure that supports insertion and deletion from both ends in O(1) time. In SDE interviews, deques are frequently tested...read more

Most Commonly Asked Data Structure Interview Questions on Queue

Last Updated: 04 March 2025

A Queue is a linear data structure that follows the First-In-First-Out (FIFO) principle. It is one of the most important and widely used data structures in computer scienc...read more

Queue Implementation in Python

Last Updated: 14 February 2025

Queue is a linear data structure that stores items in a First In First Out (FIFO) manner. With a queue, the least recently added item is removed first. One can imagine a q...read more

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Enqueue in Queues in Python

Last Updated: 16 April 2024

A queue is a basic data structurethat follows the First-In-First-Out (FIFO) principle. At the back of the queue, elements are added (enqueued), and at the front, they are ...read more

Python Programs

CSES Solutions - Josephus Problem I

Last Updated: 01 April 2024

Consider a game where there are N children (numbered 1,2 ... N) in a circle. During the game, every other child is removed from the circle until there are no children left...read more

Competitive Programming

How to Iterate over a Queue in Java?

Last Updated: 25 January 2024

Queue is a concept of Linear Data Structure that follows the concept of FIFO(First In First Out). Queues are majorly used to maintain the order of the elements to which th...read more

Java-Collections

Java-Queue-Programs

Queue Data Structure

Last Updated: 17 May 2025

A Queue Data Structure is a fundamental concept in computer science used for storing and managing data in a specific order. It follows the principle of "First in, First ou...read more

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Queue for Competitive Programming

Last Updated: 18 January 2024

In competitive programming, a queue is a data structure that is often used to solve problems that involve tasks that need to be completed in a specific order. This article...read more

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Competitive Programming

Data Structures-Queue

Queue Notes for GATE Exam [2024]

Last Updated: 24 April 2025

A Queue is defined as a linear data structure that is open at both ends and the operations are performed in First In First Out (FIFO) order. Queue is a list in which all a...read more

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FIFO Principle of Queue

Last Updated: 28 November 2023

FIFO stands for "First In, First Out". This principle dictates that the first element added to the queue is the first one to be removed. Understanding the FIFO principle i...read more

Circular Subsequence Shift with Deque

Last Updated: 17 November 2023

Given a string S of lowercase English letters, each character is linked to one of T's unique identifiers. Specifically, character positions are associated with identifiers...read more

Competitive Programming

top-dsa-problems

Find the character which remains in the end

Last Updated: 05 October 2023

Given a string S containing only characters 'A' and 'B'. In one operation, one character can able to eliminate the other character which is at any position. This procedure...read more

Last when k numbers are Repeatedly Removed from both ends

Last Updated: 27 March 2025

There are n people from 1 to n are standing in the queue at a movie ticket counter. It is a weird ticket counter, as it distributes tickets to the first k people and then ...read more

Data Structures

two-pointer-algorithm

What is Queue Data Structure?

Last Updated: 07 July 2023

What is Queue Data Structure?AQueueis defined as a linear data structure that is open at both ends and the operations are performed in First In First Out (FIFO) order.We d...read more

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