7-Check Rolling Average
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
- L5
Interview Prompt
The platform reliability team monitors latency trends per service. For each service's health check history, compute a 7-check rolling average of latency using the current check and the 6 checks immediately before it, ordered by check timestamp. Return the service name, check timestamp, raw latency, and the rolling average.
Summary
Seven entries hold the trend.
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