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Duolingo LeetCode Interview Questions

Practice 5 coding problems currently tagged to Duolingo. Use the frequency and topic signals to build a focused software engineering interview practice plan.

Last updated: September 28, 2026

0 Easy
3 Medium
2 Hard

Top Topics at Duolingo

ArrayHash TableStringDesignTrie

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Duolingo Interview Problems

ProblemDifficultyDiffFrequencyTopicsAction
Encrypt and Decrypt Strings
100%
HardH
100%
ArrayHash Table+3
Solve→
K Radius Subarray Averages
80.9%
MediumM
80.9%
ArraySliding Window
Solve→
Minimum Number of People to Teach
80.9%
MediumM
80.9%
ArrayHash Table+1
Solve→
Longest Increasing Path in a Matrix
72%
HardH
72%
ArrayDynamic Programming+7
Solve→
Task Scheduler II
67.8%
MediumM
67.8%
ArrayHash Table+1
Solve→

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Frequently Asked Questions

What LeetCode problems are tagged to Duolingo?

Our current Duolingo practice dataset contains 5 tagged coding problems, including Encrypt and Decrypt Strings, K Radius Subarray Averages, Minimum Number of People to Teach. The difficulty breakdown is 0 Easy, 3 Medium, and 2 Hard problems.

How should I prepare for a Duolingo coding interview?

Focus on the most frequently asked problems first, especially those with high frequency scores. Duolingo interviews typically emphasize Array and Hash Table. Practice explaining your thought process while coding.

What is the difficulty level of Duolingo coding interviews?

Based on our data, Duolingo interviews include 0 Easy (0%), 3 Medium (60%), and 2 Hard (40%) problems.

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