Instacart Coding Interview Questions
We track 10 coding questions asked at Instacart, tagged with the algorithms and concepts they test. The most common: Array, Hash Table, String, Binary Search, Design.
Browse all 10 Instacart questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array27.5%
- Hash Table16.7%
- String10.0%
- Binary Search7.5%
- Simulation7.5%
- Matrix6.7%
- Sorting5.8%
- Design5.0%
- Two Pointers3.3%
- Dynamic Programming2.5%
- Other (3)7.5%
How many questions involve each concept
Share of all 10 tracked Instacart questions that touch each concept. Questions usually involve several, so these overlap.
- Array80.0%
- Hash Table60.0%
- String40.0%
- Binary Search20.0%
- Design20.0%
- Matrix20.0%
- Simulation20.0%
- Sorting20.0%
- Dynamic Programming10.0%
- Greedy10.0%
- Recursion10.0%
- Trie10.0%
Where Instacart differs from the average company
Concept weight at Instacart relative to the average across all companies we track. Green means Instacart leans on it harder than most.
- Simulation4.4×
- Design3.8×
- Matrix2.9×
- Binary Search2.5×
Instacart specialties
Concepts that show up at Instacart but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 10 tracked Instacart questions.
- Junior20% (2)
- Mid/Senior70% (7)
- Staff10% (1)
Every concept in Instacart interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 8 | 80.0% | 27.5% |
| Hash Table | 6 | 60.0% | 16.7% |
| String | 4 | 40.0% | 10.0% |
| Binary Search | 2 | 20.0% | 7.5% |
| Design | 2 | 20.0% | 5.0% |
| Matrix | 2 | 20.0% | 6.7% |
| Simulation | 2 | 20.0% | 7.5% |
| Sorting | 2 | 20.0% | 5.8% |
| Dynamic Programming | 1 | 10.0% | 2.5% |
| Greedy | 1 | 10.0% | 2.5% |
| Recursion | 1 | 10.0% | 2.5% |
| Trie | 1 | 10.0% | 2.5% |
| Two Pointers | 1 | 10.0% | 3.3% |
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