DuolingoLeetCode Questions
VerifiedCommunity-reported coding interview questions for Duolingo, organized by frequency across 30-day, 3-month, and 6-month recency windows.
# | Problem | Difficulty | Frequency↓ | Acceptance | |
|---|---|---|---|---|---|
| #2227 | Encrypt and Decrypt Strings3 sources | Hard | 100% | 38.7% | |
| #2090 | K Radius Subarray Averages3 sources | Medium | 88% | 46.4% | |
| #1733 | Minimum Number of People to Teach3 sources | Medium | 88% | 67.3% | |
| #329 | Longest Increasing Path in a Matrix3 sources | Hard | 75% | 56.8% | |
| #2365 | Task Scheduler II3 sources | Medium | 74% | 54.9% |
Duolingo Technical Interview Overview & Company-Wise Questions
This page organizes 5 community-reported Duolingo LeetCode problems by difficulty, frequency, and recency so you can build a focused preparation queue. Reports are aggregated from public datasets and should be treated as preparation signals rather than predictions.
How to prioritize Duolingo preparation
Start with the 1 questions reported in the last 30 days, then work through the highest-frequency topics (Array, Hash Table, String, Design). This page tracks 5 community-reported questions across 0 Easy, 3 Medium, and 2 Hard problems. Data refreshed Oct 28, 2026.
Because Duolingo currently has 5 direct interview problems logged in community reports, technical interview loops at Duolingo typically evaluate candidates on standard data structure patterns. For optimal preparation, master these problems first, then practice the comprehensive Blind 75 and NeetCode 150 roadmaps.
Frequently Asked Questions
What are the most frequent LeetCode questions for Duolingo?
The leading problems in the available Duolingo interview reports include Encrypt and Decrypt Strings, K Radius Subarray Averages, Minimum Number of People to Teach. This page tracks 5 reported problems across Easy (0), Medium (3), and Hard (2) difficulty levels.
Where can I practice company-wise LeetCode questions for Duolingo?
You can review all 5 Duolingo questions on this page, filter them by 30-day, 3-month, 6-month, and all-time windows, and save practice progress for free.
How does LeetMap Pro organize Duolingo interview problem recency?
LeetMap Pro groups community-reported occurrences into 30-day, 3-month, 6-month, and older windows. These are preparation signals from the available sources, not guarantees that a problem will appear in a future interview.
What is the difficulty distribution for Duolingo coding questions?
Medium is the largest tracked difficulty group for Duolingo, with 3 problems. The full distribution is 0 Easy, 3 Medium, and 2 Hard.