Biggest Deployment Decline
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
A downstream report flagged a drop in one service's deploy frequency. Find which service had the biggest month-over-month drop in deployments from March to April 2026. Only include services that also appear in svc_health. Return just the service with the largest decline, showing the service name and the size of the decline.
Summary
One team's deploy count cratered. Which one?
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