Prepare for Duolingo technical interviews with 5 tracked LeetCode questions, sortable by difficulty and topic.
| Title | Difficulty | Topics | Frequency | LeetCode |
|---|---|---|---|---|
| Encrypt and Decrypt Strings | Hard | 100% | Solve | |
| Minimum Number of People to Teach | Medium | 82.6% | Solve | |
| K Radius Subarray Averages | Medium | 80.9% | Solve | |
| Longest Increasing Path in a Matrix | Hard | 45.9% | Solve | |
| Task Scheduler II | Medium | 24.1% | Solve |
5 questions total
Company analytics
Questions tracked
5
Questions currently linked to Duolingo
Topics represented
15
Distinct topics visible in this company set
Dominant difficulty
medium
60% of tracked questions
Avg frequency score
66.7
Mean frequency across this company question set
Duolingo currently has 5 tracked questions linked to 15 topics, so this page is a good benchmark for how deep the dataset goes on one employer.
The most common topics for Duolingo include Array, Hash Table, Breadth-First Search, and Depth-First Search. Array alone appears 5 times in the visible topic distribution. That topic spread helps you identify whether this company is repeating a few patterns or testing across a broader surface area.
The current question set averages a frequency score of 66.7, and medium is the dominant difficulty bucket at 60% of tracked coverage. That makes it easier to decide whether to practice for repetition, complexity, or both.
Duolingo related paths
This section answers the most practical questions about using the Duolingo route as a company-specific LeetCode study page.
Start with the highest-frequency questions inside Array, Hash Table, and Breadth-First Search, then sort the table by frequency to build a shortlist. That gives you a faster first pass through Duolingo's interview patterns than trying to cover every linked problem at once.
medium makes up 60% of the tracked Duolingo question set. Use that split to decide whether your study plan should emphasize coverage, realistic interview pressure, or deeper problem solving.
Use this page to identify Duolingo's strongest topic signal, then open Array and the global most-asked or questions explorer routes to see whether that company-specific pattern is also common across the wider dataset.
