Where Quality Breaks
A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
Data quality checks only record a fail percentage when they flag a problem, so a check that flagged one always has a recorded rate. For each source table, take just those flagged checks and report how many there were, how many different rules they involved, and their average fail rate, then surface the worst offenders.
Summary
Which tables the checks keep flagging.
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