All Blackrock Coding Interview Questions
13 questions we track for Blackrock, most frequently asked first. Practice any of them in the code editor and get AI feedback on your solution.
Start your Blackrock mock interviewQuestions Blackrock asks, live voice, scored. First one free.
- Junior46% (6)
- Mid/Senior46% (6)
- Staff8% (1)
Questions
- Two Sum129 companiesJunior
- Longest Palindromic Substring76 companiesMid/Senior
- Integer to Roman32 companiesMid/Senior
- Valid Parentheses119 companiesJunior
- Group Anagrams91 companiesMid/Senior
- Climbing Stairs38 companiesJunior
- Best Time to Buy and Sell Stock90 companiesJunior
- Number of Islands81 companiesMid/Senior
- Happy Number27 companiesJunior
- Missing Number19 companiesJunior
- Find the Duplicate Number22 companiesMid/Senior
- Boundary of Binary Tree13 companiesMid/Senior
- Find the Maximum Sum of Node Values4 companiesStaff