Retailer Data Warehouse Design
A medium 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
- medium
- Seniority
- L5
Interview Prompt
We're a mid-size e-commerce company processing about 10,000 orders per day. The analytics team needs to build dashboards for sales performance, customer segmentation, and product trends. Right now all the data lives in a normalized Postgres OLTP database and queries are slow. Can you design a dimensional model for the analytics warehouse?
Summary
Queries are crawling. The analysts are not happy.
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