Sofi Coding Interview Questions
We track 15 coding questions asked at Sofi, tagged with the algorithms and concepts they test. The most common: Hash Table, Array, String, Breadth-First Search, Counting.
Browse all 15 Sofi questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Hash Table17.2%
- Array15.1%
- String11.3%
- Breadth-First Search3.8%
- Math3.8%
- Dynamic Programming3.6%
- Linked List3.6%
- Two Pointers3.6%
- Binary Search3.6%
- Counting3.3%
- Other (17)31.3%
How many questions involve each concept
Share of all 15 tracked Sofi questions that touch each concept. Questions usually involve several, so these overlap.
- Hash Table53.3%
- Array46.7%
- String33.3%
- Breadth-First Search13.3%
- Counting13.3%
- Design13.3%
- Divide and Conquer13.3%
- Dynamic Programming13.3%
- Heap (Priority Queue)13.3%
- Linked List13.3%
- Math13.3%
- Two Pointers13.3%
Where Sofi differs from the average company
Concept weight at Sofi relative to the average across all companies we track. Green means Sofi leans on it harder than most.
- Divide and Conquer3.4×
- Counting3.3×
- Hash Table2.6×
- Design2.5×
- Array0.78×
- Math0.68×
- Dynamic Programming0.58×
Sofi specialties
Concepts that show up at Sofi but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 15 tracked Sofi questions.
- Junior13% (2)
- Mid/Senior60% (9)
- Staff27% (4)
Every concept in Sofi interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Hash Table | 8 | 53.3% | 17.2% |
| Array | 7 | 46.7% | 15.1% |
| String | 5 | 33.3% | 11.3% |
| Breadth-First Search | 2 | 13.3% | 3.8% |
| Counting | 2 | 13.3% | 3.3% |
| Design | 2 | 13.3% | 3.2% |
| Divide and Conquer | 2 | 13.3% | 2.7% |
| Dynamic Programming | 2 | 13.3% | 3.6% |
| Heap (Priority Queue) | 2 | 13.3% | 2.7% |
| Linked List | 2 | 13.3% | 3.6% |
| Math | 2 | 13.3% | 3.8% |
| Two Pointers | 2 | 13.3% | 3.6% |
| Binary Search | 1 | 6.7% | 3.6% |
| Bucket Sort | 1 | 6.7% | 0.9% |
| Depth-First Search | 1 | 6.7% | 1.4% |
| Doubly-Linked List | 1 | 6.7% | 1.8% |
| Enumeration | 1 | 6.7% | 1.8% |
| Greedy | 1 | 6.7% | 1.8% |
| Matrix | 1 | 6.7% | 1.4% |
| Merge Sort | 1 | 6.7% | 1.8% |
| Quickselect | 1 | 6.7% | 0.9% |
| Randomized | 1 | 6.7% | 1.4% |
| Simulation | 1 | 6.7% | 2.4% |
| Sliding Window | 1 | 6.7% | 2.4% |
| Sorting | 1 | 6.7% | 0.9% |
| Stack | 1 | 6.7% | 2.4% |
| Union-Find | 1 | 6.7% | 1.4% |
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