OpenAI Coding Interview Questions
We track 12 coding questions asked at OpenAI, tagged with the algorithms and concepts they test. The most common: Array, Design, Stack, Hash Table, Matrix.
Browse all 12 OpenAI questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array20.2%
- Stack13.3%
- Matrix11.5%
- String10.6%
- Design9.6%
- Hash Table7.8%
- Simulation6.5%
- Breadth-First Search3.7%
- Binary Search2.8%
- Dynamic Programming2.2%
- Other (6)12.0%
How many questions involve each concept
Share of all 12 tracked OpenAI questions that touch each concept. Questions usually involve several, so these overlap.
- Array50.0%
- Design33.3%
- Stack33.3%
- Hash Table25.0%
- Matrix25.0%
- String25.0%
- Simulation16.7%
- Binary Search8.3%
- Breadth-First Search8.3%
- Depth-First Search8.3%
- Dynamic Programming8.3%
- Iterator8.3%
Where OpenAI differs from the average company
Concept weight at OpenAI relative to the average across all companies we track. Green means OpenAI leans on it harder than most.
- Design7.4×
- Stack5.3×
- Matrix5.0×
- Simulation3.8×
OpenAI specialties
Concepts that show up at OpenAI but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 12 tracked OpenAI questions.
- Junior8% (1)
- Mid/Senior75% (9)
- Staff17% (2)
Every concept in OpenAI interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 6 | 50.0% | 20.2% |
| Design | 4 | 33.3% | 9.6% |
| Stack | 4 | 33.3% | 13.3% |
| Hash Table | 3 | 25.0% | 7.8% |
| Matrix | 3 | 25.0% | 11.5% |
| String | 3 | 25.0% | 10.6% |
| Simulation | 2 | 16.7% | 6.5% |
| Binary Search | 1 | 8.3% | 2.8% |
| Breadth-First Search | 1 | 8.3% | 3.7% |
| Depth-First Search | 1 | 8.3% | 1.9% |
| Dynamic Programming | 1 | 8.3% | 2.2% |
| Iterator | 1 | 8.3% | 1.9% |
| Monotonic Stack | 1 | 8.3% | 2.2% |
| Queue | 1 | 8.3% | 1.9% |
| Tree | 1 | 8.3% | 1.9% |
| Two Pointers | 1 | 8.3% | 2.2% |
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