Top 10 Applications of Queue in Data Structure in 2025
A queue is a vital concept in computer science which is designed to manage elements in the order they are added. It is ensuring the first element is processed first (FIFO). FIFO is straightforward but still a powerful approach that makes queue an essential component in both algorithms and real-world systems. In this blog we will be talking about the top 10 applications of queue in data structure.
Even as technology evolves, the relevance of queues exists which works as the seamless functioning of modern software and applications. In this blog we will be talking about the top 10 applications of queue in data structure.
Table of Contents
What is Queue in Data Structure ?
Imagine standing in a line where the first person standing is an example of queue data structure. It is a simple and ordered data structure that follows the First In First Out (FIFO) rule.
Queue data structure is applied for controlling the data and for the execution of tasks in many applications. And applications are operating systems, network protocols, and data processing systems. They are also used to support algorithms like BFS (Breadth-First Search).
Here are some operations of queue in data structure :
- Enqueue Operation: The process of inserting an element at the rear side.
- Dequeue Operation: This operation access or removes an element from a queue data structure front part.
- Peek Operation: This operation involves moving the particular element to the front of the queue data structure.
- isEmpty Operation: This operation checks whether the queue is empty or not.
- isFull Operation: This operation checks whether the queue is full or not.
Top 10 Applications of Queue in Data Structure
CPU Scheduling
CPU scheduling is a critical application of queue in data structure by which the operating system determines which task or program should get access to the CPU at a given time. Because many programs are executed at the same time, the OS requires the ability to divide the time fairly and share the CPU equitably.
Here the CPU scheduling’s main objective is how the resources could be used effectively in the system. It makes sure that each process will have ample CPU time, nobody will starve for CPU time while others get a very long string time-sharing session.
This is one of the great applications of queue in data structure is very significant because, no matter how many tasks are apprehensive for processing, the CPU is capable of executing only a single task at a time. By controlling activities in a line, the work is done systematically which enables working on several activities at the same time thus minimizing the waiting time.
Job Scheduling
Job scheduling is the act of organizing and executing tasks or jobs systematically. The batch processing systems schedule their jobs according to the arrival time or priority of the job. Queue makes sure that job scheduling is handled according to defined protocols.
However, the use of an application of queue in a data structure is fundamental in distributed systems and cloud computing, where several tasks contend for resources.
Job scheduling increases system throughput, minimizes delays, and fair resource allocation from all tasks.
Types of queue in Job Scheduling:
- Simple Queue: Handles tasks sequentially.
- Priority Queue: It gives precedence to critical jobs and puts them in priority.
Call Center Management
Call center systems use queues to manage incoming calls and to prioritize them. When many customers call a call center, calls are organized in a queue data structure to be fair and efficient. This application of queue in data structure leads to the improvement of the system and has actually had the added benefit of shortening processing time.
Multi-Threaded Processing
Multi-threaded processing depends because several threads serve communication over Queues which allows the distribution of tasks among the threads. Queues are intermediary tools for executing tasks in an orderly manner without conflict. This application of queue in data structure improves the functioning of the system and reduces the processing time.
This use case includes race conditions but well-coordinated interactions between threads to threads, which makes thread-safe queues counter it. Threads enqueue tasks and commit to dequeue the tasks as they become available, then split the workload and maintain stability in the system.
Key features
- The queue order of arrival is used to call.
- The priority queues get high-priority customer requests as responses to them faster.
Breadth-First Search in Graph
Breadth-First Search (BFS) is a queue-based graph traversal algorithm. Then in BFS, nodes are explored level by level, and a queue is used to track the nodes for visiting next.
BFS processes nodes systematically through queues guaranteeing a well-ordered flow of solving complex problems efficiently.
This application of queue in data structure is widely used in:
- Identifies which route is best in a navigation system.
- AI solution of mazes and puzzles.
- Computing shortest paths in social networks, or finding connections.
Data Stream Handling
Continuous demand data streams are handled effectively using queues by data stream handling frameworks like Apache Kafka and Amazon SQS. These are systems where incoming data are stored in queues, but not immediately processed in an asynchronous fashion.
How It Works?
- Incoming data is temporarily queued before being allowed to be processed asynchronously.
- It makes sure it is fault tolerant by doing delayed processing if needed.
Disk Scheduling
Disk scheduling is another important application of queue in data structure which deals with organizing requests for reading and writing to the disk. This application of queue in data structure is used since disks handle several I/O requests at once, enabling the queue to manage these requests to reduce the movement of the disk arm as much as possible in order to increase efficiency.
The disk scheduling algorithms like SCAN and C-LOOK take the requests in the queue in the most efficient manner so that there is not much latency. For example, the SCAN produces the requests in one direction in order that they can be systematically placed end to end. It is useful for data to be retrieved in an organized manner in order to enhance the performance of the system in an organization.
Print Queue Management
Print queue management is a practical application of queue in data structure used in shared printing environments. A queue allows users to submit print jobs for a single printer, and then have the jobs executed in the order they were sent.
Preparations of documents are firstly printed and stored for the moment in the print queue to be arranged sequentially and to be tackled methodically.
This avoids putting another way multiple user conflicts and not leaving any job undone. In high demand environments tried and true queues are used to keep the print workflow orderly and efficient.
How It Works:
- As soon as print requests come in they add them to the queue in the order they were received.
- Jobs are removed and performed in order on the printer.
Network Packet Management
Queues are used to classify data packets for network packet management across the networks. Input queues and output queues store incoming packets temporally (input queues), and packets ready for transmission (output queues).
This application of queue in data structure makes sure that packets are treated in sequences thereby reducing the losses as well as the delays.
For example, in routers queues are applied to head-of-line logic or priority traffic such as voice or video for timely delivery in the communication processes.
Types of Network Queues:
- Input Queues: Store incoming packets.
Output Queues: Packets departure to be transmitted.
Conclusion
The application of queue data structure is the most important process that ensures the function of modern computing systems as it provides a means of executing and organizing functions properly. Queue data structures are flexible wherever CPU scheduling, real-time messaging data handling, or other types are challenging.
These applications will enable developers to design and develop good systems that can handle the tasking demands that posed by the current day’s technological environment. That is why queue data structure remain an essential concept in the computer science list of tools and methods at this stage.
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