The Customer Who Changed
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
- L5
Interview Prompt
Our customer dimension needs to track historical changes to attributes like address, membership tier, and email. When we look at an order from 6 months ago, we need the customer's attributes as of that date, not today's values. Design the schema.
Summary
She moved. She upgraded. She became someone new. The record has to keep up.
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