Queue in Data Structure

The queue data structure is linear. It follows the FIFO approach i.e. First In First Out or Last In Last Out.
In the queue, the order of insertion is the same as the order of deletion of elements because of the FIFO approach.

Queues are mostly used whenever there is a single resource and multiple users want to use that resource. For example, in threads and CPU scheduling algorithms.

A data structure queue is analogous to a queue in real life. For example, people waiting in a queue to buy movie tickets.

Representation of a Queue

Just like a stack, the queue is also an abstract data type but it follows the FIFO approach. In the queue, we always remove the least recently added element.

A queue is open at both ends, unlike a stack. Thus we perform deletion and insertion operations at two different ends in a queue.The two ends of the queue are the Front and Rear respectively.

Front points to the index of the queue from where we can delete an element. Rear points to that index of the queue from where we insert elements.

We can represent the queue as follows:

Types of Queue

There are various types of queue data structures such as:
1. Linear queue
2. Circular queue
3. Deque
4. Priority queue

Let us see each of them in detail now:

1. Linear queue

A linear queue is a simple queue in which insertion occurs at one end and deletion occurs at the other end.
In a linear queue, we are sometimes not able to utilize memory effectively. This is because insertion can be performed only at the rear end.

Basic operations on Linear Queue:

The basic operations that we can perform on a queue are:

a. en queue (): To insert an element into the queue.

b. dequeue(): To delete an element from a queue.

c. peek(): To print/display the element at the front without deleting it.

d. isfull(): To check if the queue is full or not.

e. isempty(): To check if the queue is empty or not.

Out of the given operations, the first two operations are the most important. The rest three are used to improve the efficiency of the first two operations while implementation.

Comments

The Ultimate Guide to Pay-Per-Click (PPC) Advertising

The Ultimate Guide to Pay-Per-Click (PPC) Advertising Introduction In the fast-paced digital marketing world, businesses strive to maximize their online presence and reach their target audiences effectively. One of the most potent tools in their arsenal is Pay-Per-Click (PPC) advertising. This advertising model has revolutionized how companies attract and engage potential customers. This comprehensive guide will delve deep into PPC advertising, exploring its benefits, strategies, and best practices to help you harness its power for your business. What is Pay-Per-Click (PPC) Advertising? PPC advertising is an online marketing model where advertisers pay a fee each time their ad is clicked. Essentially, it's a way of buying visits to your site rather than earning them organically. PPC ads are displayed on search engines, social media platforms, and websites, targeting specific keywords and demographics. The Mechanics of PPC Understanding the mechanics of PPC is crucial for creating...

Difference between loc() and iloc() in Pandas DataFrame

Difference between loc() and iloc() in Pandas DataFrame Pandas library of python is very useful for the manipulation of mathematical data and is widely used in the field of machine learning. It comprises many methods for its proper functioning. loc() and iloc() are one of those methods. These are used in slicing data from the Pandas DataFrame. They help in the convenient selection of data from the DataFrame. They are used in filtering the data according to some conditions. The working of both of these methods is explained in the sample dataset of cars. loc() : loc() is label-based data selecting method which means that we have to pass the name of the row or column which we want to select. This method includes the last element of the range passed in it, unlike iloc() . loc() can accept the boolean data unlike iloc() . iloc() : iloc( ) is an indexed-based selecting method which means that we ...

Best digital marketing in Perth

Best digital marketing in Perth Introduction Your introduction into the brave new world of the digital space will be custom-tailored to your business needs requirements. You will be introduced to the crew who will be handling your project, from inception to the launch into the market. Assess It will be our job to not only know your customers but how they engage with the core products and brand relationships . From here we break down what we research, to identify the core elements needed to engage the customer. Create It’s imperative that the design of your vessel is done right from the start. Its shape, level of focus, and attention to detail are crucial for a prosperous, lucrative, and extended journey. We will always present concepts and suggestions as per the requirement, but we truly believe this process should be a collaborative one between the creative crew of the PWD and the client. The final form will dictate its progression into the development and manufacturi...

What are Advertising Strategies?

What are Advertising Strategies? Introduction In today's competitive market, businesses need to stand out to attract and retain customers. Advertising strategies are vital tools that help companies achieve this by creating awareness, generating interest, and driving sales. In this comprehensive guide, we will explore various advertising strategies, their importance, and how to implement them effectively. Understanding Advertising Strategies Advertising strategies are plans and methods used by businesses to promote their products or services. These strategies are designed to reach a target audience and persuade them to take specific actions, such as making a purchase or signing up for a service. An effective advertising strategy aligns with a company’s overall marketing goals and leverages various channels and techniques to achieve these objectives. Key Components of Advertising Strategies Market Research Understanding the Audience : Identifying the target audience is crucial. Thi...

Introduction to Transfer Learning

Introduction to Transfer Learning We, humans, are very perfect in applying the transfer of knowledge between tasks. This means that whenever we encounter a new problem or a task, we recognize it and apply our relevant knowledge from our previous learning experiences. This makes our work easy and fast to finish. For instance, if you know how to ride a bicycle and if you are asked to ride a motorbike which you have never done before. In such a case, our experience with a bicycle will come into play and handle tasks like balancing the bike, steering, etc. This will make things easier compared to a complete beginner. Such leanings are very useful in real life as it makes us more perfect and allows us to earn more experience. Following the same approach, a term was introduced Transfer Learning in the field of machine learning. This approach involves the use of knowledge that was learned in some task, and apply it to solve the problem in the related target task. While most ...

ArrayLinks

Search This Blog