Metric Definition Reverse Engineering
A hard Data Modeling 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
- Data Modeling
- Difficulty
- hard
- Seniority
- L6
Interview Prompt
We're a food delivery company like DoorDash. Our exec dashboard tracks five metrics: DAU, revenue per user, order completion rate, average delivery time, and customer lifetime value. The current SQL is a mess of nested subqueries on raw event tables. Can you design a clean dimensional model that makes these metrics simple to compute?
Summary
Five numbers on a dashboard. Your job: figure out where they come from.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Draw your data model on the schema canvas: tables, keys and relationships
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision