Both Arms of the Trial
A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
Our experimentation platform logs one record per user assignment, tagged with the feature test and the variant that user landed in. Find the tests that reached both the 'variant_a' and 'variant_b' groups, returning the test name for each.
Summary
Some features were tried both ways.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision