B2B Invoicing Data Model
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
- L4
Interview Prompt
We're a B2B SaaS company that bills customers monthly. Each invoice has a header with customer info and billing period, plus variable line items for subscription tiers, usage overages, and one-time charges. Finance needs to reconcile payments against invoices and track outstanding AR by customer. Design the data model.
Summary
Invoices go out, partial payments trickle in, and some customers are three months overdue.
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