In a circular queue, what condition indicates that the queue is full?

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Question: In a circular queue, what condition indicates that the queue is full?

Options:

Correct Answer: rear == (front + 1) % size

Solution:

In a circular queue, the condition rear == (front + 1) % size indicates that the queue is full, as it means there is no space left for new elements.

In a circular queue, what condition indicates that the queue is full?

In a circular queue, what condition indicates that the queue is full?

Step 1: Understand what a circular queue is. A circular queue is a data structure that uses a fixed-size array in a circular manner to store elements.
Step 2: Identify the two main pointers in a circular queue: 'front' and 'rear'. 'Front' points to the first element, and 'rear' points to the last element.
Step 3: Know the size of the circular queue. This is the maximum number of elements it can hold.
Step 4: Learn the formula to check if the queue is full: rear == (front + 1) % size.
Step 5: Understand the formula: 'front + 1' means the next position after 'front'. The '%' operator ensures that if it goes beyond the size, it wraps around to the beginning of the array.
Step 6: When the condition rear == (front + 1) % size is true, it means there is no space left for new elements, indicating that the queue is full.

Circular Queue – A data structure that uses a fixed-size array to represent a queue, where the end of the queue wraps around to the beginning.
Queue Full Condition – The specific condition that indicates no more elements can be added to the queue, which is determined by the relationship between the front and rear pointers.