What is Queue Data Structure? Last Updated : 07 Jul, 2023 Comments Improve Suggest changes Like Article Like Report What is Queue Data Structure?A Queue is defined as a linear data structure that is open at both ends and the operations are performed in First In First Out (FIFO) order. We define a queue to be a list in which all additions to the list are made at one end, and all deletions from the list are made at the other end. The element which is first pushed into the order, the operation is first performed on that. Queue Representation:Like stacks, Queues can also be represented in an array: In this representation, the Queue is implemented using the array. Variables used in this case are Queue: the name of the array storing queue elements.Front: the index where the first element is stored in the array representing the queue.Rear: the index where the last element is stored in an array representing the queue.FIFO Principle of Queue:A Queue is like a line waiting to purchase tickets, where the first person in line is the first person served. (i.e. First come first serve).Position of the entry in a queue ready to be served, that is, the first entry that will be removed from the queue, is called the front of the queue(sometimes, head of the queue), similarly, the position of the last entry in the queue, that is, the one most recently added, is called the rear (or the tail) of the queue. See the below figure.Characteristics of Queue:Queue can handle multiple data.We can access both ends.They are fast and flexible. Comment More infoAdvertise with us Next Article What is Queue Data Structure? C code_r Follow Improve Article Tags : Queue DSA Practice Tags : Queue Similar Reads Queue Data Structure A Queue Data Structure is a fundamental concept in computer science used for storing and managing data in a specific order. It follows the principle of "First in, First out" (FIFO), where the first element added to the queue is the first one to be removed. It is used as a buffer in computer systems 2 min read What is an in-memory Queue in Data Structures What is an in-memory Queue? An in-memory queue is a queue that stores data in memory. In-memory queues are used to improve application performance by providing a fast, low-latency way to access data. They are often used in conjunction with other data storage mechanisms, such as databases, to provide 5 min read Introduction to Queue Data Structure Queue is a linear data structure that follows FIFO (First In First Out) Principle, so the first element inserted is the first to be popped out. FIFO Principle in Queue:FIFO Principle states that the first element added to the Queue will be the first one to be removed or processed. So, Queue is like 5 min read LMNs-Data Structures Data structures are ways to organize and store data so it can be used efficiently. They are essential in computer science for managing and processing information in programs. Common types of data structures include arrays, linked lists, stacks, queues, trees, and graphs. Each structure is designed f 14 min read Applications of Queue Data Structure Introduction : A queue is a linear data structure that follows the "first-in, first-out" (FIFO) principle. It is a collection of elements that supports two primary operations - enqueue and dequeue. In the enqueue operation, an element is added to the back of the queue, while in the dequeue operation 5 min read Like