If a list contains N nodes, what does the length() function return?

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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

If a list contains N nodes, what does the length() function return?

Explanation:
Length is the count of nodes in a linked list. If there are N nodes, the length() function returns N because it reports exactly how many elements are stored in the list. This can be obtained by walking from the head to the end and counting each node, or by maintaining a counter that updates whenever nodes are inserted or removed. It won’t be N-1 or N+1, and it will be 0 only when the list is empty. Remember that, unlike arrays, linked lists don’t have a last index—length reflects the total number of elements, not an index.

Length is the count of nodes in a linked list. If there are N nodes, the length() function returns N because it reports exactly how many elements are stored in the list. This can be obtained by walking from the head to the end and counting each node, or by maintaining a counter that updates whenever nodes are inserted or removed. It won’t be N-1 or N+1, and it will be 0 only when the list is empty. Remember that, unlike arrays, linked lists don’t have a last index—length reflects the total number of elements, not an index.

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