At T Coding Interview Questions
We track 4 coding questions asked at At T, tagged with the algorithms and concepts they test. The most common: String, Array, Hash Table, Math, Matrix.
Browse all 4 At T questions →Concept mix
Each question's weight is split evenly across its concepts, so the shares sum to 100%.
- String27.8%
- Stack16.7%
- Array11.1%
- Hash Table11.1%
- Math11.1%
- Matrix11.1%
- Sliding Window11.1%
How many questions involve each concept
Share of all 4 tracked At T questions that touch each concept. Questions usually involve several, so these overlap.
- String50.0%
- Array25.0%
- Hash Table25.0%
- Math25.0%
- Matrix25.0%
- Sliding Window25.0%
- Stack25.0%
Where At T differs from the average company
Concept weight at At T relative to the average across all companies we track. Green means At T leans on it harder than most.
- String2.9×
Difficulty mix
Level split of the 4 tracked At T questions.
- Junior25% (1)
- Mid/Senior75% (3)
Every concept in At T interviews
| Concept | Questions | % of questions | Share of mix |
|---|---|---|---|
| String | 2 | 50.0% | 27.8% |
| Array | 1 | 25.0% | 11.1% |
| Hash Table | 1 | 25.0% | 11.1% |
| Math | 1 | 25.0% | 11.1% |
| Matrix | 1 | 25.0% | 11.1% |
| Sliding Window | 1 | 25.0% | 11.1% |
| Stack | 1 | 25.0% | 16.7% |
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