In a circular queue, what condition indicates that the queue is full?
Practice Questions
Q1
In a circular queue, what condition indicates that the queue is full?
front == rear
rear == (front + 1) % size
front == (rear + 1) % size
rear == front
Questions & Step-by-Step Solutions
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.
