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Interview question tracker

Duolingo Coding Interview Questions — All time

Practice 5 coding questions from Duolingo company-tagged LeetCode lists across all available reporting periods. Explore reported interview questions and track your progress.

Company-wide data from Fahad7177-jeh/leetcode-company-wise-questions; see its AGPL-3.0 license. All-time questions also use dataengineervishal/leetcode-companywise-questions (MIT license).

Reporting periods reflect source data, not verified interview dates. Questions can recur; inclusion does not guarantee they will appear in your interview.

Updated weekly · Latest source check: 15 Oct 2026ⓘLatest successful check of the sources used by this company. A check does not necessarily mean the questions changed.

One question at a time.

Top questions 5

Done	Question	LeetCode
Mark Encrypt and Decrypt Strings completed	Encrypt and Decrypt Strings	Solve
Mark Minimum Number of People to Teach completed	Minimum Number of People to Teach	Solve
Mark K Radius Subarray Averages completed	K Radius Subarray Averages	Solve
Mark Longest Increasing Path in a Matrix completed	Longest Increasing Path in a Matrix	Solve
Mark Task Scheduler II completed	Task Scheduler II	Solve