The Shape of Waiting
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
We're running a latency review across the API and want to see how each endpoint's response times spread out rather than collapse into a single average. Split every endpoint's calls into four equal-sized tiers running from fastest to slowest, and for each endpoint-tier report the fastest, slowest, and average latency.
Summary
Every request waits its turn, and some wait far longer than the rest. Map where the patience runs out.
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