What is the advantage of circular queue over simple queue?

Answer 1

Circular queue have less memory consuption as compared to linear queue because while doing insertion after deletion operation it allocate an extra space the first remaining vacant but in circular queue the first is used as it comes immediate after the last.

Answer 2

With a standard linked list, you only have constant time access to the head of the queue (it's the only link you have to the list) so all insertions and extractions must be performed at the head in order to maintain efficiency. Thus linked lists are only suitable for stack structures (last in, first out). If you wish to use a linked list as a queue (first in, first out), you must maintain a separate link to the tail to perform insertions at the tail in constant time. You cannot extract from the tail in constant time because there's no direct link back to the penultimate node which will naturally become the new tail.

With a circular linked list, however, you do not need two separate links to the head and tail because the tail points to the head. Thus you get constant time access to both the head and the tail through a single link to the tail alone. You still cannot extract from the tail in constant time, but it's a more efficient method of implementing a queue.

Answer 3

A standard queue suffers from a rebuffering problem during dequeue operations. By making the queue circular and linking the head to the tail, this alleviates the problem and allows insertion and deletion in constant time.

Answer 4

Circular queue have less memory consumption as compared to linear queue because while doing insertion after deletion operation it allocate an extra space the first remaining vacant but in circular queue the first is used as it comes immediate after the last.

Answer 5

In a singly-linked list, you need to maintain two pointers in order to locate the head and tail in constant time. With a circular list you need only maintain a pointer to the tail since the head node is always the tail's next node.

Similarly, with doubly-linked lists, you need only maintain a single pointer to the head or tail in a circular implementation.

Answer 6

The queue is a linear data structure where operations of insertion and deletion are performed at separate ends also known as front and rear. Queue is a FIFO structure that is first in first out. A circular queue is similar to the normal queue with the difference that queue is circular queue ; that is pointer rear can point to beginning of the queue when it reaches at the end of the queue. The advantage of circular queue over linear queue is that empty location left due to deletion of elements using front pointer can again be filled using rear pointer.

Answer 7

circular queue is a special type of queue in which last position and first position are assumed as adjacent position. It means in circular queue first position after last position. If front=0 and rear=N-1 or front=rear+1, then circular queue is full and we can't perform insertion of new element and overflow condition will occur. If rear=N-1 and front is not equal to 0, then we set rear=0 for insertion of new element. If first element is inserted in queue then front=rear=-1 will be set on front=rear=0. Otherwise, rear will be increased by 1.