What Are the Examples of Applications of Queue Data Structure?


Heather Bennett

What Are the Examples of Applications of Queue Data Structure?

A queue is a linear data structure that follows the FIFO (First-In-First-Out) principle. In a queue, elements are added at the rear and removed from the front.

This data structure finds applications in various real-world scenarios where data needs to be managed in a specific order. Let’s explore some examples of where queues are used:

1. Operating Systems:

In operating systems, queues are extensively used for managing processes.

The operating system maintains a queue of processes waiting to be executed. Each process is added to the end of the queue when it arrives and is removed from the front when it gets its turn to execute.

2. Printers and Spooling:

In printing systems, queues are used for print job management.

Multiple users can send print jobs simultaneously, but printers can only handle one job at a time. The print jobs are organized in a queue, and the printer picks up each job from the front of the queue and prints it.

3. Call Center Systems:

In call centers, queues play a crucial role in managing incoming customer calls.

When all operators are busy attending other calls, new incoming calls are placed in a queue until an operator becomes available. Once an operator finishes their current call, they pick up the next call from the front of the queue.

4. Network Routing:

In computer networks, routers use queues to manage incoming packets.

When multiple packets arrive at a router simultaneously, they need to be processed and forwarded one by one according to routing protocols. These packets are placed in different queues based on their priority or type, and the router processes them in the order they were received.

5. Task Scheduling:

In task scheduling algorithms, queues are used to manage the order in which tasks are executed.

Each task is assigned a priority or time quantum, and tasks with higher priority or smaller time quantum are placed at the front of the queue. This ensures that important tasks or tasks with shorter execution times get executed earlier.

6. Web Servers:

In web servers, queues are used to handle incoming requests from clients.

When multiple requests arrive simultaneously, they are placed in a queue and processed one by one by the server. This prevents overwhelming the server with too many requests at once and ensures that each request gets processed in a fair manner.


These are just a few examples of how queues find applications in various domains. The simplicity and efficiency of the queue data structure make it an essential tool for managing data in specific orders according to real-world requirements.

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