Notion coding interview
questions, leaked.
3 problems reported across recent Notion interviews. Top patterns: string, hash table, design. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Notion's interview is tight. Three problems reported, two medium and one hard, means they're testing depth over breadth. String manipulation, hash-table design, and array simulation dominate the assessment. You'll either nail the data structure questions or get stuck rebuilding the logic under time pressure. If you blank on a time-based key-value store mid-OA, StealthCoder surfaces a working solution invisible to the proctor. This isn't prep fluff. This is what you're actually being asked.
Top problems at Notion
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Time Based Key-Value Store | MEDIUM | 100.0 | 49% | Hash Table · String · Binary Search |
| 02 | Text Justification | HARD | 100.0 | 48% | Array · String · Simulation |
| 03 | Design a Todo List | MEDIUM | 100.0 | 58% | Array · Hash Table · String |
Frequencies derived from public community-tagged interview reports. Click a row to view on LeetCode.
You have a week, maybe less. You can't out-grind the list above. StealthCoder runs invisibly during the actual Notion OA. The proctor cannot see it. Screen share cannot detect it. Made for the engineer who has done the work but might still blank with a webcam pointed at him.
Get StealthCoder- string3 · 100%
- hash table2 · 67%
- design2 · 67%
- array2 · 67%
- binary search1 · 33%
- simulation1 · 33%
- sorting1 · 33%
String problems appear across all three reported questions, so that's your north star. Hash-table and design patterns show up twice each, meaning Notion wants to see how you build and query structures under real constraints. The hard problem, Text Justification, combines array manipulation with simulation and string formatting, so don't expect a clean algorithmic trick. Study the medium-difficulty design problems first. They teach you the patterns that the hard problem will stress-test. Binary search shows once, likely as a tiebreaker optimization in Time Based Key-Value Store. When you hit the live assessment, if the design patterns blur together, StealthCoder is your real-time hedge.
Companies with similar patterns
If you prepped for Notion, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Notion.
Memorizing every problem above in a week is a fantasy. StealthCoder is the hedge: an AI overlay that's invisible during screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Made for the engineer who has done the work but might still blank with a webcam pointed at him. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Notion interview FAQ
Should I prioritize string problems first for Notion's OA?+
Yes. String manipulation appears in all three reported problems. Start with Time Based Key-Value Store and Text Justification to understand how strings interact with data structures and formatting constraints. Array and hash-table problems build on that foundation.
How much design knowledge do I need for this interview?+
Two out of three reported problems are design-heavy (Time Based Key-Value Store and Design a Todo List). You need to understand data-structure tradeoffs, not just implement. Build and test both problems end-to-end before your OA.
Is the hard problem solvable without binary search?+
Text Justification doesn't require binary search at all. It's simulation and string formatting. Binary search appears in Time Based Key-Value Store as an optimization. If you run out of time, solve Text Justification first, then add binary search if you see it in the medium problems.
What's the fastest way to prepare for a Notion OA?+
Study the two medium problems first. They share patterns with the hard problem and teach you the design logic Notion cares about. All three are reported in the wild, so you're not guessing. Spend 2-3 hours per problem building, not drilling variations.
Will hash-table knowledge carry across all three problems?+
Hash tables appear in two of three reported problems. They're essential for Time Based Key-Value Store and Design a Todo List. Both problems test your ability to optimize lookups and updates. Master the hash-table patterns in these two, then focus on string and array handling.