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. 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++. In a normal queue, once the queue becomes full, we cannot insert the next element even if there is a space in front of the queue. But using the circular queue, we can use the space to store new values.
YouTube Excerpt: In this video I discuss how to think about and implement a
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