Design a Hotel Management System Object-Oriented Design Interview
Design a hotel domain model covering room types and rooms, guests, a half-open date-range value object, the reservation lifecycle, room assignment, check-in/out, and a charges folio, while preventing overlapping bookings on the same room.
1. Problem Statement
Design a hotel management system: guests reserve a room type for a date range, the hotel assigns a specific room, and the stay goes through check-in and check-out while charges accumulate on a folio. No two stays on the same room may overlap. Start by clarifying scope and the core objects.
2. Live Coding Format
Work in the provided coding workspace while explaining your decisions to the live interviewer. Validation may use inline tests, examples, comments, or a verbal walkthrough.
3. Key Focus Areas
- 1RoomType/Room modeling and per-type availability
- 2Half-open DateRange value object and overlap detection
- 3Reservation vs. room assignment and lifecycle transitions
- 4Folio charges in integer cents
4. What Strong Candidates Should Demonstrate
- ✓Model RoomType vs. Room and reservation vs. room assignment distinctly.
- ✓Design a half-open DateRange value object with correct overlap semantics.
- ✓Prevent overlapping active stays on the same assigned room.
- ✓Model the reservation lifecycle and a folio of integer-cent charges.
Want interactive feedback?
Practice this problem in the live coding workspace while the interviewer probes your clarification, implementation, trade-offs, and validation.
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