Web Reference: Oct 30, 2025 · A circular queue is a linear data structure that overcomes the limitations of a simple queue. In a normal array implementation, dequeue () can be O (n) or we may waste space. Using a circular array, both enqueue () and dequeue () can be done in O (1). Declaration using Array: Circular queue avoids the wastage of space in a regular queue implementation using arrays. In this tutorial, you will understand circular queue data structure and it's implementations in Python, Java, C, and C++. Queue can be one linear data structure. But it may create some problem if we implement queue using array. Sometimes by using some consecutive insert and delete operation, the front and rear position will change. In that moment, it will look like the queue has no space to insert elements into it.
YouTube Excerpt: In this video I discuss how to think about and implement a
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