The Space Between
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
- L4
Interview Prompt
An onboarding team measures user momentum as the average gap, in seconds, between each of a user's events and the one immediately before it in chronological order. Give them that average gap per user.
Summary
The time between events is the tell.
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