Answer:
A queue is a data structure used for storing data (similar to Linked Lists and Stacks). In queue, the order in which data arrives is important. In general, a queue is a line of people or things waiting to be served in sequential order starting at the beginning of the line or sequence.
Definition: A queue is an ordered list in which insertions are done at one end (rear) and deletions are done at other end (front). The first element to be inserted is the first one to be deleted. Hence, it is called First in First out (FIFO) or Last in Last out (LILO) list.
Similar to Stacks, special names are given to the two changes that can be made to a queue. When an element is inserted in a queue, the concept is called EnQueue, and when an element is removed from the queue, the concept is called DeQueue.
DeQueueing an empty queue is called underflow and EnQueuing an element in a full queue is called overflow. Generally, we treat them as exceptions. As an example, consider the snapshot of the queue.
A queue is a linear data structure that follows the "first-in, first-out" (FIFO) principle. This means that the first item to be added to the queue will be the first item to be removed from the queue. Think of a queue as a line at a store, where the first person in line is the first person to be helped by the cashier. Queues can be implemented using various data structures such as arrays, linked lists, and circular buffers. They can be used in a wide variety of applications, such as scheduling tasks, maintaining communication buffers, and handling user requests in a system.