First Contact
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
- L3
Interview Prompt
The performance team is measuring first-impression latency: the first time each user hits a given endpoint, how long that call took. For every endpoint, report the average of those first-contact latencies, slowest endpoints first.
Summary
Every user's first hello to an endpoint. Timed.
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