Data Structures | Linked List | Question 13

What are the time complexities of finding 8th element from beginning and 8th element from end in a singly linked list?

Let n be the number of nodes in linked list, you may assume that n > 8.
(A) O(1) and O(n)
(B) O(1) and O(1)
(C) O(n) and O(1)
(D) O(n) and O(n)


Answer: (A)

Explanation: Finding 8th element from beginning requires 8 nodes to be traversed which takes constant time.

Finding 8th from end requires the complete list to be traversed.

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