Relation between Doubly Linked List and Circular Linked List

Question

What is the relation between Doubly Linked List and Circular Linked List?

Answer 1

A doubly linked list is a linked list wherein each node knows where neighbors of both are.

A circular linked list is a linked list wherein the "tail" of the list is linked to certain "root". (Remember that both the tail and root of the list are not defined or arbitrary within a circular linked list.

Doubly linked lists are really not essentially related to circular linked list (from both sides being based upon a linked list structure). Actually, you can have a circular doubly linked list, where every node knows where neighbors of both are and where the list wraps approximately to attach to itself.