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WithoutBook LIVE Mock Interviews Linked List Related interview subjects: 74

Interview Questions and Answers

Know the top Linked List interview questions and answers for freshers and experienced candidates to prepare for job interviews.

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The Best LIVE Mock Interview - You should go through before interview

Know the top Linked List interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Interview Questions and Answers

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Intermediate / 1 to 5 years experienced level questions & answers

Ques 1

Implement a function to reverse a singly linked list.

To reverse a linked list, you can iterate through the list and reverse the direction of pointers.

Example:

Input: 1 -> 2 -> 3 -> 4 -> 5
Output: 5 -> 4 -> 3 -> 2 -> 1
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Ques 2

Detect a cycle in a linked list.

You can use Floyd's cycle-finding algorithm, also known as the 'tortoise and hare' algorithm.

Example:

Input: 1 -> 2 -> 3 -> 4 -> 5 -> 2 (cycle)
Output: True
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Ques 3

Merge two sorted linked lists into a single sorted list.

Traverse both lists simultaneously, compare elements, and merge them into a new sorted list.

Example:

Input: List1: 1 -> 3 -> 5, List2: 2 -> 4 -> 6
Output: 1 -> 2 -> 3 -> 4 -> 5 -> 6
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Ques 6

Rotate a linked list by k places.

Find the length of the list, then move (length - k % length) steps to the right.

Example:

Input: 1 -> 2 -> 3 -> 4 -> 5, k = 2
Output: 4 -> 5 -> 1 -> 2 -> 3
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Ques 7

Detect the intersection point of two linked lists.

Find the lengths of both lists, move the longer list's pointer ahead, and then iterate to find the intersection.

Example:

Input: List1: 1 -> 2 -> 3, List2: 6 -> 5 -> 2 -> 3
Output: Node with value 2
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