Web Reference: In computer science, a queue is an abstract data type that serves as an ordered collection of entities. By convention, the end of the queue where elements are added, is called the back, tail, or rear of the queue. Jan 31, 2026 · Abstract Data Types (ADTs) define what operations are allowed, while User Defined Types (UDTs) define how data is stored and implemented. Focuses on allowed operations and their behaviour, without implementation details. Focuses on how data is organized in memory and how operations are executed. The queue abstract data type is defined by the following structure and operations. A queue is structured, as described above, as an ordered collection of items which are added at one end, called the “rear,” and removed from the other end, called the “front.”
YouTube Excerpt: Concepts: FIFO (First in First Out) Structure
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