In a circular singly linked list with a tail pointer, what does tail.next reference?

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Master Linked Lists Structures for Data Structures Tests. Utilize flashcards and multiple choice questions with detailed explanations for each, ensuring your readiness for the exam!

Multiple Choice

In a circular singly linked list with a tail pointer, what does tail.next reference?

Explanation:
In a circular singly linked list, the nodes form a loop so the next pointer of the last node connects back to the first node. The tail pointer is kept to allow constant-time insertions at the end, and from the last node, following next brings you to the head again. So tail.next points to the head of the list (and if there’s only one node, it points to that same node). This is what makes the list circular.

In a circular singly linked list, the nodes form a loop so the next pointer of the last node connects back to the first node. The tail pointer is kept to allow constant-time insertions at the end, and from the last node, following next brings you to the head again. So tail.next points to the head of the list (and if there’s only one node, it points to that same node). This is what makes the list circular.

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