Barclays Coding Interview Questions
We track 15 coding questions asked at Barclays, tagged with the algorithms and concepts they test. The most common: Array, String, Hash Table, Depth-First Search, Greedy.
Browse all 15 Barclays questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- String16.1%
- Array14.3%
- Database6.7%
- Trie5.6%
- Stack5.0%
- Two Pointers5.0%
- Hash Table4.7%
- Depth-First Search4.7%
- Math4.4%
- Greedy3.9%
- Other (13)29.5%
How many questions involve each concept
Share of all 15 tracked Barclays questions that touch each concept. Questions usually involve several, so these overlap.
- Array46.7%
- String40.0%
- Hash Table20.0%
- Depth-First Search13.3%
- Greedy13.3%
- Math13.3%
- Matrix13.3%
- Simulation13.3%
- Stack13.3%
- Trie13.3%
- Two Pointers13.3%
- Binary Search6.7%
Where Barclays differs from the average company
Concept weight at Barclays relative to the average across all companies we track. Green means Barclays leans on it harder than most.
- Trie11.2×
- Simulation2.1×
- Depth-First Search2.0×
- Stack2.0×
- Math0.79×
- Array0.74×
- Hash Table0.70×
Barclays specialties
Concepts that show up at Barclays but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 15 tracked Barclays questions.
- Junior33% (5)
- Mid/Senior60% (9)
- Staff7% (1)
Every concept in Barclays interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 7 | 46.7% | 14.3% |
| String | 6 | 40.0% | 16.1% |
| Hash Table | 3 | 20.0% | 4.7% |
| Depth-First Search | 2 | 13.3% | 4.7% |
| Greedy | 2 | 13.3% | 3.9% |
| Math | 2 | 13.3% | 4.4% |
| Matrix | 2 | 13.3% | 3.6% |
| Simulation | 2 | 13.3% | 3.6% |
| Stack | 2 | 13.3% | 5.0% |
| Trie | 2 | 13.3% | 5.6% |
| Two Pointers | 2 | 13.3% | 5.0% |
| Binary Search | 1 | 6.7% | 3.3% |
| Breadth-First Search | 1 | 6.7% | 1.3% |
| Counting | 1 | 6.7% | 3.3% |
| Database | 1 | 6.7% | 6.7% |
| Dynamic Programming | 1 | 6.7% | 2.2% |
| Heap (Priority Queue) | 1 | 6.7% | 1.3% |
| Memoization | 1 | 6.7% | 2.2% |
| Monotonic Stack | 1 | 6.7% | 1.7% |
| Prefix Sum | 1 | 6.7% | 2.2% |
| Sorting | 1 | 6.7% | 1.3% |
| String Matching | 1 | 6.7% | 2.2% |
| Union-Find | 1 | 6.7% | 1.3% |
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