Fault Lines
A medium SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- 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. For every day and region, give them 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 and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision