The Person They Were Then
A easy Data Modeling mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Data Modeling
- Difficulty
- easy
- Seniority
- mid
Interview Prompt
We run a messaging app where a user's subscription tier and country both drift over time, and the ad-revenue team needs every past impression to reflect the tier and country the user actually had the moment it fired. Design the schema that lets analysts slice historical ad revenue by the profile state as of each event.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your data modeling solution with real code execution
- Get instant feedback and a hire/no-hire decision