7-Day Onboarding Conversion
A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
The growth team is evaluating early onboarding for a board review, focused on users who entered an experiment in the first seven days of January 2026. For each platform and experiment entry date, find what share of those users had a meaningful session soon after entering, reporting the total users, the converted users, and the conversion percentage.
Summary
Signed up Monday. Still here by Sunday?
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