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

L6

Problem

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.

Practice This Problem

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