BlackRock interview questions¶
The most frequent LeetCode problems tagged to BlackRock. This is a data-only page. For process and behavioral prep, use the coding guide and behavioral guide.
Based on 3 distinct problems tagged to BlackRock in the last 6 months (3 in the last 30 days, 3 in the last 3 months, 16 all-time) across two open datasets of LeetCode company tags. Tags are user-reported, so treat frequency as a signal, not a promise.
Difficulty mix (last 6 months): Medium 67%, Easy 33%
Most tagged topics (share of problems): Tree 67%, Depth-First Search 67%, Binary Tree 67%, Binary Lifting 67%, Lowest Common Ancestor 67%, String 33%, Stack 33%, Bracket Sequences 33%, Binary Search Tree 33%
Watch out: BlackRock has thin LeetCode data. Weight the reported questions and the format notes above more than this list.
Most frequent problems¶
Ranked by frequency, weighted toward the last 30 days. Classics like Two Sum sit near the top of almost every company's list because users tag them everywhere. Solve those fast. The signature list below is more specific to this company.
| # | Problem | Difficulty | Last seen | Topics |
|---|---|---|---|---|
| 1 | Valid Parentheses | Easy | 30 days | String, Stack, Bracket Sequences |
| 2 | Lowest Common Ancestor of a Binary Search Tree | Medium | 30 days | Tree, Depth-First Search, Binary Search Tree, Binary Tree |
| 3 | Lowest Common Ancestor of a Binary Tree | Medium | 30 days | Tree, Depth-First Search, Binary Tree, Binary Lifting |
Signature problems¶
Problems where BlackRock accounts for a large share of all recent tags across companies. These are the most BlackRock-specific questions in the data.
| # | Problem | Difficulty | Last seen | Topics |
|---|---|---|---|---|
| 1 | Lowest Common Ancestor of a Binary Search Tree | Medium | 30 days | Tree, Depth-First Search, Binary Search Tree, Binary Tree |
Sources¶
- liquidslr/leetcode-company-wise-problems and snehasishroy/leetcode-companywise-interview-questions, merged by scripts/build_question_data.py.
Next: More companies