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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
mid

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.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your data modeling solution with real code execution
  4. Get instant feedback and a hire/no-hire decision