The Float
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
- mid
Interview Prompt
A card issuer needs a warehouse that reconciles what a cardholder can spend right now against what has actually posted to their account. Every swipe creates a temporary hold that later settles, often for a different amount and sometimes never, and a cardholder can dispute a charge after it posts. Model the schema that supports available-credit checks, statement generation, and dispute tracking across accounts that each belong to a customer.
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