A Circular queue of capacity 'n – 1' elements is implemented with an array of 'n' elements. Assume that the insertion and deletion operations are carried out using REAR and FRONT as array index variables, respectively. Initially, REAR = FRONT = 0. The conditions to detect queue full and queue empty are?
Question
A Circular queue of capacity 'n – 1' elements is implemented with an array of 'n' elements. Assume that the insertion and deletion operations are carried out using REAR and FRONT as array index variables, respectively. Initially, REAR = FRONT = 0. The conditions to detect queue full and queue empty are?
Solution
The conditions to detect if the circular queue is full or empty are as follows:
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Queue is Full: The queue is considered full when (REAR + 1) mod n = FRONT. This condition checks if the REAR has reached the end of the array and the FRONT is at the beginning of the array, indicating that the queue is full.
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Queue is Empty: The queue is considered empty when FRONT = REAR. This condition checks if the FRONT and REAR are at the same position, indicating that the queue is empty.
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