Largest A/B Test by Participants
A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L3
Interview Prompt
The data science team is identifying which A/B test drew the widest audience. Which test had the most unique participants? Return the test name and its count for the single top test.
Summary
The biggest experiment ever run.
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