Whatnot Coding Interview Questions
We track 13 coding questions asked at Whatnot, tagged with the algorithms and concepts they test. The most common: Array, Matrix, String, Sorting, Binary Search.
Browse all 13 Whatnot questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array15.5%
- Dynamic Programming12.1%
- String11.7%
- Matrix8.9%
- Binary Search6.8%
- Sorting6.6%
- Two Pointers6.1%
- Interactive4.5%
- Stack4.5%
- Depth-First Search3.6%
- Other (10)19.5%
How many questions involve each concept
Share of all 13 tracked Whatnot questions that touch each concept. Questions usually involve several, so these overlap.
- Array53.8%
- Matrix30.8%
- String30.8%
- Sorting23.1%
- Binary Search15.4%
- Depth-First Search15.4%
- Divide and Conquer15.4%
- Dynamic Programming15.4%
- Two Pointers15.4%
- Backtracking7.7%
- Breadth-First Search7.7%
- Geometry7.7%
Where Whatnot differs from the average company
Concept weight at Whatnot relative to the average across all companies we track. Green means Whatnot leans on it harder than most.
- Divide and Conquer4.5×
- Matrix3.9×
- Binary Search2.3×
- Dynamic Programming2.0×
- Array0.80×
Whatnot specialties
Concepts that show up at Whatnot but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 13 tracked Whatnot questions.
- Junior31% (4)
- Mid/Senior69% (9)
Every concept in Whatnot interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 7 | 53.8% | 15.5% |
| Matrix | 4 | 30.8% | 8.9% |
| String | 4 | 30.8% | 11.7% |
| Sorting | 3 | 23.1% | 6.6% |
| Binary Search | 2 | 15.4% | 6.8% |
| Depth-First Search | 2 | 15.4% | 3.6% |
| Divide and Conquer | 2 | 15.4% | 3.6% |
| Dynamic Programming | 2 | 15.4% | 12.1% |
| Two Pointers | 2 | 15.4% | 6.1% |
| Backtracking | 1 | 7.7% | 1.8% |
| Breadth-First Search | 1 | 7.7% | 1.8% |
| Geometry | 1 | 7.7% | 1.3% |
| Greedy | 1 | 7.7% | 3.0% |
| Hash Table | 1 | 7.7% | 2.3% |
| Heap (Priority Queue) | 1 | 7.7% | 1.3% |
| Interactive | 1 | 7.7% | 4.5% |
| Math | 1 | 7.7% | 1.3% |
| Quickselect | 1 | 7.7% | 1.3% |
| Stack | 1 | 7.7% | 4.5% |
| Union-Find | 1 | 7.7% | 1.8% |
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