Rarest Latency Value
A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
An SRE flagged a latency outlier. Find the highest latency value that appears at most twice across all API calls. First identify latency values that occur once or twice, then find the maximum among those.
Summary
A latency value that appeared exactly once.
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