A queue is a linear data structure that follows a First In First Out (FIFO) order.

FIFO means elements are added to the end of the queue and removed from the front.

Queues are commonly used to manage the flow of data and to ensure that data is processed in a timely manner.

Queues can be implemented using data structures, such as arrays, linked lists, or circular buffers

Queues can have a fixed size, or they can be dynamic and expand as per users need.

Queues can be bounded, meaning that they have a maximum size, or unbounded, meaning that they can grow indefinitely.

Queues can be used in a variety of applications, including task scheduling, communication between threads, data buffering , etc.