Quiz on Circular and Double-Ended Queues

What is a circular queue?

• A linear queue that uses a linked list.

• A linear queue that allows insertion at the end and deletion from the front.

• A linear data structure that wraps around upon reaching the end.

• A stack that allows insertion and deletion at both ends.

What is one main advantage of a circular queue over a linear queue?

• Easier to implement

• More efficient use of memory

• Allows random access

• Simpler to manage

In a circular queue implemented using an array, if the front is at index 2 and the rear is at index 4, what will be the new position of the rear after one insertion?

• 5

• 6

• 0

• 3

What is the condition for a circular queue to be empty?

• front == rear

• front == rear + 1

• (rear + 1) % size == front

• front == -1

What is the condition for a circular queue to be full?

• front == rear

• front == rear + 1

• (rear + 1) % size == front

• front == -1

In a circular queue of size 5, if the front is at index 0 and the rear is at index 4, where will the rear be after one insertion?

• 0

• 1

• 3

• 5

How is the 'enqueue' operation performed in a circular queue?

• By incrementing the rear index and inserting the element at the rear

• By decrementing the rear index and inserting the element at the rear

• By incrementing the front index and inserting the element at the front

• By decrementing the front index and inserting the element at the front

How is the 'dequeue' operation performed in a circular queue?

• By incrementing the rear index and removing the element at the rear

• By decrementing the rear index and removing the element at the rear

• By incrementing the front index and removing the element at the front

• By decrementing the front index and removing the element at the front

Which of the following applications can use a circular queue?

• Printer spooler

• Call center phone system

• Memory management

• All of the above

What happens when you try to insert an element into a full circular queue?

• The element is added to the queue, overwriting the oldest element

• The element is not added, and an overflow condition occurs

• The element is added to the beginning of the queue

• The element is added to the end of the queue