Jane Street Coding Interview Questions
We track 13 coding questions asked at Jane Street, tagged with the algorithms and concepts they test. The most common: Array, String, Simulation, Hash Table, Design.
Browse all 13 Jane Street questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array21.4%
- String13.7%
- Simulation12.8%
- Hash Table10.3%
- Math10.3%
- Stack5.1%
- Design4.7%
- Trie4.1%
- Doubly-Linked List3.2%
- Linked List3.2%
- Other (5)11.2%
How many questions involve each concept
Share of all 13 tracked Jane Street questions that touch each concept. Questions usually involve several, so these overlap.
- Array61.5%
- String46.2%
- Simulation38.5%
- Hash Table30.8%
- Design23.1%
- Doubly-Linked List15.4%
- Linked List15.4%
- Math15.4%
- Stack15.4%
- Trie15.4%
- Counting7.7%
- Data Stream7.7%
Where Jane Street differs from the average company
Concept weight at Jane Street relative to the average across all companies we track. Green means Jane Street leans on it harder than most.
- Doubly-Linked List10.7×
- Trie8.2×
- Simulation7.5×
- Design3.6×
Jane Street specialties
Concepts that show up at Jane Street but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 13 tracked Jane Street questions.
- Junior54% (7)
- Mid/Senior23% (3)
- Staff23% (3)
Every concept in Jane Street interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 8 | 61.5% | 21.4% |
| String | 6 | 46.2% | 13.7% |
| Simulation | 5 | 38.5% | 12.8% |
| Hash Table | 4 | 30.8% | 10.3% |
| Design | 3 | 23.1% | 4.7% |
| Doubly-Linked List | 2 | 15.4% | 3.2% |
| Linked List | 2 | 15.4% | 3.2% |
| Math | 2 | 15.4% | 10.3% |
| Stack | 2 | 15.4% | 5.1% |
| Trie | 2 | 15.4% | 4.1% |
| Counting | 1 | 7.7% | 1.9% |
| Data Stream | 1 | 7.7% | 1.5% |
| Dynamic Programming | 1 | 7.7% | 2.6% |
| Heap (Priority Queue) | 1 | 7.7% | 2.6% |
| Sorting | 1 | 7.7% | 2.6% |
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