Circular Queue and Priority Queue Circular Queue: A circular queue is a queue in which elements are added to the rear and removed from the front. The qu...
Circular Queue and Priority Queue
Circular Queue:
A circular queue is a queue in which elements are added to the rear and removed from the front. The queue is implemented using a circular buffer or array. When the buffer reaches its maximum capacity, elements are deleted from the front of the queue to make space for new elements.
Priority Queue:
A priority queue is a queue in which elements are added to the rear based on their priority. Elements with higher priority are placed at the rear of the queue, while elements with lower priority are placed at the front. The queue maintains the property that the element with the highest priority is always at the rear of the queue.
Key Differences:
Direction of element movement: In a circular queue, elements move from the rear to the front. In a priority queue, elements move from the rear to the front.
Rear and front pointers: The rear pointer of a circular queue points to the position right after the end of the buffer. The front pointer points to the position right before the beginning of the buffer.
Implementation: Circular queue can be implemented using an array. Priority queue can be implemented using an array or a linked list.
Example:
Circular Queue:
0 -> 1 -> 2 -> 3 -> 4 -> 0
Priority Queue:
0 -> 1 -> 2 -> 3 -> 4 -> 5 -> 0
Applications:
Circular queues are used when it is important to preserve the order of elements or to process them in a specific order. Priority queues are used when it is necessary to process elements based on their priority or to maintain a specific order of elements