The Notification Lifecycle
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
- L4
Interview Prompt
Our push notification system logs delivery outcomes per user. For registered users only, pivot their notification counts into separate columns for delivered, opened, and failed. Return user ID and the three counts.
Summary
Sent, opened, ignored. What happened after the alert went out?
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