Database Design Interview Questions

12 real Database Design questions asked in live technical interviews — each with a model answer. Updated weekly.

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These Database Design interview questions were captured from real interviews by candidates using Assisting AI. Each links to a full model answer. For real-time help during your own interview, get Assisting AI from ₹500/day.

Which columns would you select for partitioning if you want to perform partitioning on a particular table?🟡 Medium · Conceptual · Asked 1×Are you aware of normalization techniques?🟢 Easy · Conceptual · Asked 1×Are you aware of the data modeling concept?🟢 Easy · Conceptual · Asked 1×Can you explain the difference between a physical model and a logical model?🟡 Medium · Conceptual · Asked 1×Explain the steps to create a physical model from a logical model. Identify the high‑level entities, break them down, and establish relationships. Which normal form is generally enforced in the physical model, and at what level of normalization is this done?🟡 Medium · Conceptual · Asked 1×How many types of data modeling are there, and what are the three major types?🟢 Easy · Conceptual · Asked 1×Talk about primary keys and foreign keys. What is the difference between them, and in which scenarios would you pick each?🟡 Medium · Conceptual · Asked 1×Are you comfortable with data modeling? Do you understand data modeling techniques and star schemas? Have you had experience with them?🟡 Medium · Conceptual · Asked 1×In a bank, what information would you store in the customer table? What columns would you include for account number, customer ID, account type, and demographic information?🟡 Medium · Conceptual · Asked 1×What columns would you include in a CRM customer table? Can you list some example columns?🟢 Easy · Conceptual · Asked 1×Do we need an employee ID in the employee table?🟡 Medium · Conceptual · Asked 1×Is a distribution key used for data distribution in a database?🟡 Medium · Conceptual · Asked 1×

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