Millennium Coding Interview Questions
We track 11 coding questions asked at Millennium, tagged with the algorithms and concepts they test. The most common: Array, String, Dynamic Programming, Tree, Binary Tree.
Browse all 11 Millennium questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- Array18.2%
- String13.6%
- Dynamic Programming10.6%
- Tree7.6%
- Binary Tree5.3%
- Depth-First Search5.3%
- Sorting4.5%
- Stack4.5%
- Backtracking3.0%
- Breadth-First Search3.0%
- Other (11)24.3%
How many questions involve each concept
Share of all 11 tracked Millennium questions that touch each concept. Questions usually involve several, so these overlap.
- Array54.5%
- String36.4%
- Dynamic Programming27.3%
- Tree27.3%
- Binary Tree18.2%
- Depth-First Search18.2%
- Backtracking9.1%
- Binary Search Tree9.1%
- Breadth-First Search9.1%
- Design9.1%
- Graph Theory9.1%
- Greedy9.1%
Where Millennium differs from the average company
Concept weight at Millennium relative to the average across all companies we track. Green means Millennium leans on it harder than most.
- Tree5.1×
- Binary Tree4.1×
- Depth-First Search2.3×
- Dynamic Programming1.7×
Millennium specialties
Concepts that show up at Millennium but are rarely asked elsewhere. They are easy to get blindsided by.
Difficulty mix
Level split of the 11 tracked Millennium questions.
- Junior18% (2)
- Mid/Senior55% (6)
- Staff27% (3)
Every concept in Millennium interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| Array | 6 | 54.5% | 18.2% |
| String | 4 | 36.4% | 13.6% |
| Dynamic Programming | 3 | 27.3% | 10.6% |
| Tree | 3 | 27.3% | 7.6% |
| Binary Tree | 2 | 18.2% | 5.3% |
| Depth-First Search | 2 | 18.2% | 5.3% |
| Backtracking | 1 | 9.1% | 3.0% |
| Binary Search Tree | 1 | 9.1% | 2.3% |
| Breadth-First Search | 1 | 9.1% | 3.0% |
| Design | 1 | 9.1% | 2.3% |
| Graph Theory | 1 | 9.1% | 2.3% |
| Greedy | 1 | 9.1% | 3.0% |
| Hash Table | 1 | 9.1% | 1.5% |
| Linked List | 1 | 9.1% | 2.3% |
| Memoization | 1 | 9.1% | 1.5% |
| Queue | 1 | 9.1% | 2.3% |
| Sorting | 1 | 9.1% | 4.5% |
| Stack | 1 | 9.1% | 4.5% |
| Topological Sort | 1 | 9.1% | 2.3% |
| Trie | 1 | 9.1% | 1.5% |
| Two Pointers | 1 | 9.1% | 3.0% |
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