Web Reference: Jan 20, 2026 · 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 out" (FIFO), where the first element added to the queue is the first one to be removed. A queue is an object (an abstract data structure - ADT) that allows the following operations: 1. Enqueue: Add an element to the end of the queue 2. Dequeue: Remove an element from the front of the queue 3. IsEmpty: Check if the queue is empty 4. IsFull: Check if the queue is full 5. Peek: Get the value of the front of the queue without removing it Queues can be implemented by using arrays or linked lists. Queues can be used to implement job scheduling for an office printer, order processing for e-tickets, or to create algorithms for breadth-first search in graphs. Queues are often mentioned together with Stacks, which is a similar data structure described on the previous page.
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