In a doubly linked list, how many pointers need to be updated to insert a new node at the end? Group of answer choices3421

To insert a new node at the end of a doubly linked list, the pointers that need to be updated are as follows:

1. New Node Connections: The new node being added will need its pointers set:

   • The prev pointer of the new node will point to the current last node.
   • The next pointer of the new node will point to NULL, as it will become the last node.

2. Current Last Node Update: The current last node’s next pointer must be updated to point to the new node.

Summary of Pointer Updates

• 3 pointers need to be updated:
  • The prev pointer of the new node.
  • The next pointer of the new node.
  • The next pointer of the current last node.

Final Answer

Therefore, the answer is 3.