DSA
Queue & Deque
Learn about First-In-First-Out (FIFO) data structures, circular queues, and double-ended queues for efficient data processing.
By TechCoder TeamLast updated: 2026-06-02
In a Nutshell
Learn about First-In-First-Out (FIFO) data structures, circular queues, and double-ended queues for efficient data processing. This hands-on tutorial focuses on practical implementation of queue & deque concepts.
Queue & Deque
A Queue is a linear data structure that follows the FIFO (First-In-First-Out) principle. The element added first is the one to be removed first.
Operations
- Enqueue: Add an element to the back.
- Dequeue: Remove an element from the front.
- Peek: Get the front element without removing it.
Deque (Double-Ended Queue)
A Deque (pronounced 'deck') allows insertion and deletion from both ends (front and back).
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Applications
- Breadth-First Search (BFS) task management.
- Operating System process scheduling.
- Print Spooling systems.