The Failure Report
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
- L6
Interview Prompt
The reliability team is building a daily failure report and treats each user's age_bucket as a stand-in for region. Looking only at open, error, and crash events, give them for every day and region the number of error and crash events as a share of the number of opens.
Summary
Errors by day and region. Some areas are worse than they appear.
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