A linked list whose last node points back to both the head node and the previous node instead of containing the null pointer ____________
Question
A linked list whose last node points back to both the head node and the previous node instead of containing the null pointer ____________
Solution
The linked list you're describing is known as a doubly circular linked list. In a doubly circular linked list, the last node points back to the head node (first node) and also to the previous node. This is different from a regular linked list where the last node contains a null pointer.
Here are the steps to create a doubly circular linked list:
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Create a Node class: This class will have three properties: data (to hold the value), next (to point to the next node), and prev (to point to the previous node).
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Create a DoublyCircularLinkedList class: This class will have two properties: head (to point to the first node), and tail (to point to the last node).
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Add nodes: To add a node, you first check if the head is null. If it is, the new node becomes both the head and the tail. If the head is not null, you add the new node to the end of the list and update the tail
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