The High and the Low
A hard SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
The on-call engineer is reviewing latency extremes in `svc_health`: which services posted the highest and the lowest latency in each US region, labeled 'highest' or 'lowest' by the end they sit at?
Summary
The fastest and slowest in every region.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision