Your question is Library System Design. 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).
Object-oriented design: design the classes for a library
Asked in the Onsite OOD stage. Define the core domain objects, their responsibilities, relationships, and key operations. Explain how your design handles borrowing, returns, availability, and extensibility without exposing implementation details unnecessarily.