Then and Now
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
- L5
Interview Prompt
We track every model version with the accuracy it scored and the time it was trained, and a version only counts when both of those are recorded. For each model, report its average accuracy across all counted versions, the accuracy of its most recent version, and the gap between that latest accuracy and the average of its earlier versions, everything rounded to two decimals. A model with only one counted version has no earlier versions, so its gap is 0.
Summary
Accuracy used to be higher.
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