Rotate a linked list by K places Test

Given the head of a linked list, rotate the linked list to the right by k places. Return the new head node.

Available in

1 skills measured

Linked lists

Test Type

Coding Test

Duration

25 Mins

Level

Beginner

Questions

Use of Rotate a linked list by K places Test

The task is to shift the linked list k positions to the right. The length of the list is not given. To solve the problem, first, we need to find the length of the linked list and the tail node. Then we calculate the effective rotation length. If k is equal to the length of the list or a multiple of the length of the list, the list remains unchanged. Otherwise, we find the new tail node and the new head node by traversing the linked list. Finally, we rotate the linked list and return the new head node.

Skills measured

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Linked lists

In the problem of rotating a linked list by K places, the skill of manipulating pointers and iterating through nodes in a linked list is crucial. By understanding how to traverse a linked list and adjust the connections between nodes, one can efficiently rotate the list by shifting elements K positions to the right or left. This skill is important as it allows for the implementation of various operations on linked lists, such as reversing, merging, or sorting, which are commonly used in programming and data manipulation tasks. Mastering this skill can lead to more efficient and optimized algorithms for working with linked lists.

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The Rotate a linked list by K places test is created by a subject-matter expert

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