Robinhood Coding Interview Questions
We track 15 coding questions asked at Robinhood, tagged with the algorithms and concepts they test. The most common: Array, Hash Table, Depth-First Search, String, Breadth-First Search.
Browse all 15 Robinhood questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array23.9%
- String11.8%
- Hash Table10.6%
- Database7.1%
- Depth-First Search7.0%
- Simulation4.8%
- Breadth-First Search4.6%
- Heap (Priority Queue)4.2%
- Dynamic Programming3.6%
- Counting3.2%
- Other (12)19.1%
How many questions involve each concept
Share of all 15 tracked Robinhood questions that touch each concept. Questions usually involve several, so these overlap.
- Array80.0%
- Hash Table40.0%
- Depth-First Search26.7%
- String26.7%
- Breadth-First Search20.0%
- Counting20.0%
- Heap (Priority Queue)20.0%
- Bucket Sort13.3%
- Matrix13.3%
- Simulation13.3%
- Sorting13.3%
- Binary Search6.7%
Where Robinhood differs from the average company
Concept weight at Robinhood relative to the average across all companies we track. Green means Robinhood leans on it harder than most.
- Bucket Sort18.0×
- Counting3.2×
- Depth-First Search3.0×
- Simulation2.8×
- Sorting0.46×
Robinhood specialties
Concepts that show up at Robinhood but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 15 tracked Robinhood questions.
- Junior20% (3)
- Mid/Senior73% (11)
- Staff7% (1)
Every concept in Robinhood interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 12 | 80.0% | 23.9% |
| Hash Table | 6 | 40.0% | 10.6% |
| Depth-First Search | 4 | 26.7% | 7.0% |
| String | 4 | 26.7% | 11.8% |
| Breadth-First Search | 3 | 20.0% | 4.6% |
| Counting | 3 | 20.0% | 3.2% |
| Heap (Priority Queue) | 3 | 20.0% | 4.2% |
| Bucket Sort | 2 | 13.3% | 1.8% |
| Matrix | 2 | 13.3% | 3.2% |
| Simulation | 2 | 13.3% | 4.8% |
| Sorting | 2 | 13.3% | 1.8% |
| Binary Search | 1 | 6.7% | 1.8% |
| Bit Manipulation | 1 | 6.7% | 1.4% |
| Database | 1 | 6.7% | 7.1% |
| Divide and Conquer | 1 | 6.7% | 0.9% |
| Dynamic Programming | 1 | 6.7% | 3.6% |
| Prefix Sum | 1 | 6.7% | 1.8% |
| Quickselect | 1 | 6.7% | 0.9% |
| Tree | 1 | 6.7% | 1.4% |
| Trie | 1 | 6.7% | 0.9% |
| Two Pointers | 1 | 6.7% | 1.8% |
| Union-Find | 1 | 6.7% | 1.4% |
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