A hard Data Modeling interview practice problem on DataDriven. Write and execute real data modeling code with instant grading.

Domain

Data Modeling

Difficulty

hard

Seniority

L5

Problem

We have a global subscription business with hundreds of millions of subscribers across multiple plan tiers and regions. Subscribers can upgrade, downgrade, pause, cancel, and re-subscribe. Finance and product analytics need a data model that supports churn analysis, revenue reporting, and plan mix reporting. Design the data model.

Summary

They cancelled. They came back. The report has to tell both stories correctly.

Practice This Problem

Solve this Data Modeling problem with real code execution. DataDriven runs your solution and grades it automatically.