Active User Open Rate
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 engagement team is measuring notification effectiveness for the quarterly product review. Compute the percentage of all push notifications that were both sent to a user with an active account and opened by the recipient. Notifications should still be counted in the denominator even if the user's account record no longer exists.
Summary
What share of push notifications were opened by active users
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