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Linked Lists interview questions

Linked Lists interview questions.

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  • 1.

    Name some advantages of Linked List

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  • 2.

    Define Linked List

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  • 3.

    Name some disadvantages of Linked Lists?

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  • 4.

    What is a cycle/loop in the singly-linked list?

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  • 5.

    What are some types of Linked List?

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  • 6.

    What is time complexity of Linked List operations?

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  • 7.

    Under what circumstances are Linked Lists useful?

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  • 8.

    How to implement Linked List Using Stack?

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  • 9.

    How to reverse a singly Linked List using only two pointers?

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  • 10.

    What is complexity of push and pop for a Stack implemented using a LinkedList?

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  • 11.

    Detect if a List is Cyclic using Hash Table

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  • 12.

    Convert a Singly Linked List to Circular Linked List

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  • 13.

    Insert an item in a sorted Linked List maintaining order

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  • 14.

    Convert a Single Linked List to a Double Linked List

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  • 15.

    When to use a Linked List over an Array/Array List?

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  • 16.

    Compare Array based vs Linked List stack implementations

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  • 17.

    Why does linked list delete and insert operation have complexity of O(1)?

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  • 18.

    When should I use a List vs a LinkedList?

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  • 19.

    When is a loop in a Linked List useful?

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  • 20.

    Floyd's Cycle Detect Algorithm: How to detect a Cycle (or Loop) in a Linked List?

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  • 21.

    Floyd's Cycle Detect Algorithm: Remove Cycle (Loop) from a Linked List

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  • 22.

    Floyd's Cycle Detect Algorithm: Explain how to find a starting node of a Cycle in a Linked List?

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  • 23.

    Merge two sorted singly Linked Lists without creating new nodes

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  • 24.

    How to find Nth element from the end of a singly Linked List?

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  • 25.

    Implement Double Linked List from Stack with min complexity

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  • 26.

    Convert a Binary Tree to a Doubly Linked List

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  • 27.

    Remove duplicates from an unsorted Linked List

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  • 28.

    Find similar elements from two Linked Lists and return the result as a Linked List

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  • 29.

    Split the Linked List into k consecutive linked list "parts"

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  • 30.

    Sum two numbers represented as Linked Lists

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  • 31.

    How would you compare Dynamic Arrays with Linked Lists and vice versa?

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  • 32.

    Why is Merge sort preferred over Quick sort for sorting Linked Lists?

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  • 33.

    How would you traverse a Linked List in O(n1/2)?

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  • 34.

    How to apply Binary Search O(log n) on a sorted Linked List?

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  • 35.

    How is it possible to do Binary Search on a Doubly-Linked List in O(n) time?

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  • 36.

    When is doubly linked list more efficient than singly linked list?

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  • 37.

    Why would you ever do Binary Search on a Doubly-Linked list?

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  • 38.

    How to recursively reverse a Linked List?

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  • 39.

    Find Merge (Intersection) Point of Two Linked Lists

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  • 40.

    Given a singly Linked List, determine if it is a Palindrome

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  • 41.

    Find the length of a Linked List which contains cycle (loop)

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  • 42.

    Do you know any better than than Floyd's algorithm for cycle detection?

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  • 43.

    Copy a Linked List with Random (Arbitrary) Pointer using O(1) Space

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