What is queue ? how to implement and why to use

What is a Queue

The Queue is basically a Data Structure that is organized in a particular manner where it does not allow rearrangement of information. The first in still the first out, meaning the first element that is put to the queue is the first one to be ‘taken’ out. The illustration of the queue linear structure will make sense if it is taken as a straight line consisting of people hoping to buy tickets. The person at the front desk is the first one who gets the stub.

Let's observe some key uses of Queues.

Task Scheduling: Operating systems employ queues as data structures to control tasks and processes.
Data Buffering: In data transmission as in IO Buffers and Streaming Media, queues are used in buffering.
Print Queue: If a few documents came to the printer more than one, then the order in which the documents came will be the order in which they will be printed.
Call Center Systems: Outside calls ring up, and when the ring is answered, it goes to tell answering queues in proper order.

Queue Examples of the World

1. Ticket Booking System

In order to reserve the tickets online, the buyers' requests will be queued. The first request gets the first reserved ticket. This is necessary so that everybody gets a fair share during the reservation.

2. Order Processing in E-commerce

When an order is placed by a customer in any of the e-commerce systems, that action is queued for fulfillment. Currently, this is what happens on the e-commerce sites, and the first order received gets executed first to position all the orders efficiently.

3. Tools Used to Deliver Customer Service

In customer service, if users raise requests, they are queued one after the other for response by the support agents, therefore enhancing the speed of response and the satisfaction of the customer.

A Simulation of a Queue along a Service Delivery Line

Here’s an example of how a queue can be simulated with the help of HTML, CSS, and JavaScript to show how members in a queue are added and removed from the queue.

The Queue Simulation

Enter a number in the box to add to the queue and click on "Add to Queue"; first item click on “Remove from Queue” to dequeue the first item out. This adheres to the First-In-First-Out principle.

Conclusion

Queue is one of the common data structures used in programming for the very purpose of holding on to the objects that need to be processed in a specific order which I can say working on the extending “Queuing” as well as even “Task Management”. Just as its applications in the real world, where there are long queues in a ticketing system where people buy tickets to watch movies or take an airplane, there are in most computer applications as well, only in a different way. With queues, one never feels stuck in the middle of a task which is also very helpful in coding and also problem-solving in the development of software.