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LINKEDIN · CODING QUESTIONS

LinkedIn coding interview questions

The data structures and algorithms questions candidates report from LinkedIn interviews, linked to AlgoRung problems with an editor, hidden tests, an animated walkthrough and solutions in four languages. Most asked topics: Trees & BST, Graphs, Arrays & Hashing, Intervals.

From public candidate reports and LinkedIn's careers pages, checked November 2026. Processes vary by team. AlgoRung is not affiliated with LinkedIn.

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All 9 reported LinkedIn coding questions

Difficulty
Topic
9 questions
  1. Max Stack Hard Design Data Structures also Salesforce
  2. Merge Intervals Medium Intervals also Netflix, Atlassian, Oracle
  3. Word Ladder Hard Graphs also Google, Amazon
  4. Serialize and Deserialize Binary Tree Hard Trees & BST also Amazon, Meta, Oracle
  5. Minimum Window Substring Hard Arrays & Hashing also Google, Meta, Oracle
  6. Kadane's Algorithm - Simple Medium Arrays & Hashing also Adobe
  7. Permutations Medium Recursion & Backtracking
  8. Longest Palindromic Subsequence Medium Dynamic Programming also Goldman Sachs
  9. Valid Word Abbreviation Easy Arrays & Hashing also Meta
Also reported, not on AlgoRung yet (6)

Nested List Weight Sum · Find Leaves of Binary Tree · Shortest Word Distance II · Find the Celebrity · Insert Interval · Repeated DNA Sequences

How the coding round is scored · The online assessment

Questions people ask

What coding questions does LinkedIn ask?

Candidates most often report Max Stack, Merge Intervals, Word Ladder, Serialize and Deserialize Binary Tree, Minimum Window Substring. The full list of 9 reported questions is on this page, each linked to a practice problem with solutions.

Which topics should I study for the LinkedIn coding interview?

trees, graphs, intervals, strings, stacks, dynamic programming. A 45 to 60 minute live interview where you solve one or two data-structures-and-algorithms problems while explaining your thinking. Interviewers score problem solving, code quality, testing and communication.

How hard are LinkedIn coding questions?

Of the reported questions on AlgoRung, 1 are easy, 4 medium and 4 hard. Expect mostly medium problems, with follow-ups that change a constraint.

Coding questions at other companies

Coding questions across all companies · Behavioral questions