Basic Operations in Queue Data Structure

What is Queue Data Structure?

Queue Data Structure is a linear data structure that is open at both ends and the operations are performed in First In First Out (FIFO) order....

Representation of Queue Data Structure:

The image below shows how we represent Queue Data Structure:...

Types of Queue Data Structure:

Queue data structure can be classified into 4 types:...

Basic Operations in Queue Data Structure:

Some of the basic operations for Queue in Data Structure are:...

1. Enqueue Operation in Queue Data Structure:

Enqueue() operation in Queue adds (or stores) an element to the end of the queue.The following steps should be taken to enqueue (insert) data into a queue:...

2. Dequeue Operation in Queue Data Structure:

Removes (or access) the first element from the queue.The following steps are taken to perform the dequeue operation:...

3. Front Operation in Queue Data Structure:

This operation returns the element at the front end without removing it....

4. Rear Operation in Queue Data Structure:

This operation returns the element at the rear end without removing it....

5. isEmpty Operation in Queue Data Structure:

This operation returns a boolean value that indicates whether the queue is empty or not....

6. isFull Operation in Queue Structure:

This operation returns a boolean value that indicates whether the queue is full or not....

Implementation of Queue Data Structure:

Queue can be implemented using following data structures:...

Complexity Analysis of Operations on Queue Data Structure:

Operations Time Complexity Space Complexity Enqueue O(1)O(1) DequeueO(1)O(1) Front O(1) O(1) BackO(1) O(1) isEmptyO(1) O(1) isFull O(1) O(1)...

Applications of Queue Data Structure:

Application of queue is common. In a computer system, there may be queues of tasks waiting for the printer, for access to disk storage, or even in a time-sharing system, for use of the CPU. Within a single program, there may be multiple requests to be kept in a queue, or one task may create other tasks, which must be done in turn by keeping them in a queue....

Advantages of Queue Data Structure:

A large amount of data can be managed efficiently with ease.Operations such as insertion and deletion can be performed with ease as it follows the first in first out rule.Queues are useful when a particular service is used by multiple consumers.Queues are fast in speed for data inter-process communication.Queues can be used in the implementation of other data structures....

Disadvantages of Queue Data Structure:

The operations such as insertion and deletion of elements from the middle are time consuming.Searching an element takes O(N) time.Maximum size of a queue must be defined prior in case of array implementation....

FAQs (Frequently asked questions) on Queue Data Structure:

1. What data structure can be used to implement a priority queue?...