Modify a data structure : Add To Head - part 2

The video tutorial explains how to add a new node to the head of a linked list. It covers two scenarios: when the list is empty and when it already contains nodes. For an empty list, the new node becomes both the head and tail. For a non-empty list, the new node is connected to the existing nodes by adjusting pointers. The tutorial also details the implementation of the add to head method, ensuring the new node is correctly set as the head in both scenarios.

What must be considered when adding a node to the head of a linked list?

• The size of the linked list

• Whether the list is empty or not

• The data type of the node

• The color of the node

When adding a node to a non-empty linked list, what must be updated?

• The color of the nodes

• The size of the linked list

• The previous and next pointers of the nodes

• The data of the new node

In a non-empty linked list, what should the previous pointer of the old head point to after adding a new head?

• Null

• The second node

• The new head node

• The tail node

What happens to the tail pointer when adding a node to an empty linked list?

• It points to the new node

• It points to null

• It points to the old head

• It remains unchanged

Why is the new node set as both head and tail in an empty linked list?

• To reduce memory usage

• To simplify the code

• To increase efficiency

• Because it is the only node

What is the purpose of the 'add to head' method in a linked list?

• To remove nodes from the list

• To sort the nodes in the list

• To add nodes to the end of the list

• To add nodes to the beginning of the list

What is the final step in the 'add to head' method?

• Sorting the list

• Setting the head to the new node

• Setting the tail to the new node

• Removing the old head