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deque

66 posts

Most Commonly Asked Data Structure Interview Questions on Deque

Last Updated: 07 September 2025

A deque (double-ended queue) is a powerful linear data structure that allows insertion and deletion from both ends. It is widely used in real-world applications like slidi...read more

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Last Updated: 29 March 2025

Given a Dequedcontaining non-negative integers.Complete below functionsdepending type of query as mentioned andprovided to you (indexing starts from 0):1.eraseAt(x):this f...read more

Deque Traversal

Last Updated: 23 July 2025

Given a dequedqcontaining integer elements, the task is to traverse thedqand print its elements of it.Examples:Input: dq = [1, 2, 3, 4, 5]Output: 1 2 3 4 5Explanation: We ...read more

Standard Library for Deque Operations

Last Updated: 27 March 2025

A deque (double-ended queue) is a data structure that allows elements to be added or removed from both ends, providing greater flexibility than a standard queue. It combin...read more

Data Structures

Websites & Apps

Introduction and Array Implementation of Deque

Last Updated: 23 July 2025

A Deque (Double-Ended Queue) is a data structure that allows elements to be added or removed from both ends—front and rear. Unlike a regular queue, which only allows inser...read more

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Data Structures

Implementation of Deque using Array - Simple

Last Updated: 12 March 2025

A Deque (Double-Ended Queue) is a data structure that allows insertion and deletion of elements at both ends (front and rear). This flexibility makes it more versatile tha...read more

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Operations on Deque

Last Updated: 23 July 2025

A Deque (Double-Ended Queue) is a linear data structure that allows elements to be added or removed from both ends—front and rear. Unlike a regular queue that adds and rem...read more

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Stack Implementation using Deque

Last Updated: 23 July 2025

A doubly ended queue or deque allows insertion and deletion at both ends. In a stack, we need to do insertions and deletions at one end only. We can use either end of dequ...read more

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Deque vs List in Python

Last Updated: 23 July 2025

Python provides multiple data structures to handle collections of data, with list and deque (double-ended queue) being two commonly used structures, each offering unique a...read more

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Python Data Structures Practice Problems

Last Updated: 23 July 2025

Python Data Structures Practice Problems page covers essential structures, from lists and dictionaries to advanced ones like sets, heaps, and deques. These exercises help ...read more

Python Programs

Data Structures-Heap

How to Find Median of All Elements in a Deque in C++?

Last Updated: 23 July 2025

In C++, the median of the deque is defined as the middle element when the size of the deque is odd and the average of the middle two elements when the size is even in the ...read more

How to Find the Size of a Deque in C++?

Last Updated: 23 July 2025

In C++, deque also known as double-ended queues are containers that allow efficient insertion and deletion operations from both ends of the deque. In this article, we will...read more

How to Find Mode of All Elements in a Deque in C++?

Last Updated: 23 July 2025

In C++, deque is a container provided by the STL library of C++ that allows insertion and deletion from both ends. The mode of a deque represents the element that appears ...read more

How to Copy a One Deque to Another in C++?

Last Updated: 23 July 2025

In C++, STL provides a container called deque (short for double-ended queue) that allows fast insertion and deletion at both its beginning and its end. In some scenarios, ...read more

How to Check if a Deque is Empty in C++?

Last Updated: 23 July 2025

In C++, a deque is a container provided by the STL library that is similar to a queue. However, unlike queues, it allows insertion and deletion from both ends. In this art...read more