Cloudflare Coding Interview Questions
We track 11 coding questions asked at Cloudflare, tagged with the algorithms and concepts they test. The most common: Array, Design, Linked List, Breadth-First Search, Depth-First Search.
Browse all 11 Cloudflare questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array16.1%
- Math11.1%
- Design9.3%
- Linked List8.3%
- Sorting7.4%
- Two Pointers7.4%
- Breadth-First Search5.0%
- Depth-First Search5.0%
- Stack3.7%
- Divide and Conquer2.8%
- Other (9)24.0%
How many questions involve each concept
Share of all 11 tracked Cloudflare questions that touch each concept. Questions usually involve several, so these overlap.
- Array45.5%
- Design27.3%
- Linked List27.3%
- Breadth-First Search18.2%
- Depth-First Search18.2%
- Sorting18.2%
- Two Pointers18.2%
- Divide and Conquer9.1%
- Doubly-Linked List9.1%
- Graph Theory9.1%
- Hash Table9.1%
- Heap (Priority Queue)9.1%
Where Cloudflare differs from the average company
Concept weight at Cloudflare relative to the average across all companies we track. Green means Cloudflare leans on it harder than most.
- Design7.2×
- Linked List4.0×
- Breadth-First Search2.3×
- Depth-First Search2.2×
- Array0.83×
Cloudflare specialties
Concepts that show up at Cloudflare but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 11 tracked Cloudflare questions.
- Junior9% (1)
- Mid/Senior73% (8)
- Staff18% (2)
Every concept in Cloudflare interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 5 | 45.5% | 16.1% |
| Design | 3 | 27.3% | 9.3% |
| Linked List | 3 | 27.3% | 8.3% |
| Breadth-First Search | 2 | 18.2% | 5.0% |
| Depth-First Search | 2 | 18.2% | 5.0% |
| Sorting | 2 | 18.2% | 7.4% |
| Two Pointers | 2 | 18.2% | 7.4% |
| Divide and Conquer | 1 | 9.1% | 2.8% |
| Doubly-Linked List | 1 | 9.1% | 2.8% |
| Graph Theory | 1 | 9.1% | 2.8% |
| Hash Table | 1 | 9.1% | 2.8% |
| Heap (Priority Queue) | 1 | 9.1% | 2.8% |
| Math | 1 | 9.1% | 11.1% |
| Matrix | 1 | 9.1% | 2.2% |
| Merge Sort | 1 | 9.1% | 2.8% |
| Queue | 1 | 9.1% | 2.8% |
| Stack | 1 | 9.1% | 3.7% |
| Topological Sort | 1 | 9.1% | 2.8% |
| Union-Find | 1 | 9.1% | 2.2% |
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