The Fault Lines
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
- L5
Interview Prompt
Given a users table and an event_data table, write a query that computes the negative outcome rate for each account status: the fraction of that group's events whose type is error, timeout, or crash, ordered worst first.
Summary
Some account groups hit far more errors than others. Surface the ones that break most.
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