To traverse a doubly linked list, you typically start from:Group of answer choicesEither the tail node or the head nodeThe tail nodeThe head nodeAny node

Explanation of Doubly Linked Lists

A doubly linked list is a type of data structure that consists of nodes, where each node contains three elements: a data field, a pointer to the next node (next pointer), and a pointer to the previous node (previous pointer). This structure allows traversal in both directions—forward and backward.

Answering the Question

1. Traversal Principle:

   • When traversing a doubly linked list, you can start from any node, but the most common practice is to begin at a specific end of the list.

2. Starting at Head or Tail:

   • You can start at the head node if you want to traverse the list forward. This is a common approach as it allows you to access all subsequent nodes sequentially.
   • Conversely, if you wish to traverse backward, starting from the tail node is appropriate, as it allows you to access all preceding nodes.

3. Conclusion:

   • While it's technically accurate to state you can start at any node in a doubly linked list, the most standard practices are to initialize the traversal from either the head node (for forward traversal) or the tail node (for backward traversal).

Final Answer

Either the tail node or the head node is the best selection for traversal in a doubly linked list.