Your question is Functional vs Non-Functional vs Rules. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Explain the difference between a functional requirement, a non-functional requirement, and a business rule.
Define each category clearly, explain how they differ, and give a brief example of each. The interviewer is assessing whether you can classify requirements accurately and communicate distinctions that help analysts, engineers, and stakeholders align. A strong response should mention that functional requirements describe behavior, non-functional requirements describe quality attributes or constraints, and business rules express policies or decisions that govern the business.