[Solved] You need to design a room type hierarchy for a hotel system that includes Room, Bedroom, ConferenceRoom, and Suite.... Which design approach best models this? | LLD

LLD - Design — Hotel Booking System

You need to design a room type hierarchy for a hotel system that includes Room, Bedroom, ConferenceRoom, and Suite. Suites can have multiple bedrooms and a living area. Which design approach best models this?

AMake Suite inherit from Room and include a list of Bedroom objects plus living area

BMake Suite inherit from Bedroom and add living area attributes

CMake Suite a separate class unrelated to Room hierarchy

DMake Bedroom inherit from Suite to reuse features

Step-by-Step Solution

Solution:

Step 1: Analyze relationships
Suite is a special Room that contains multiple Bedrooms and a living area, so it should inherit from Room.
Step 2: Model composition
Suite should have a list of Bedroom objects (composition) to represent multiple bedrooms, plus its own living area attributes.
Final Answer:
Make Suite inherit from Room and include a list of Bedroom objects plus living area -> Option A
Quick Check:
Use inheritance + composition for complex types [OK]

Quick Trick: Use composition for multiple rooms inside Suite [OK]

Common Mistakes:

MISTAKES

Using inheritance to model 'has-many' relationships
Ignoring composition for complex room types
Making unrelated classes inherit incorrectly

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Which design approach best models this?

Step 1: Analyze relationships

Step 2: Model composition

Final Answer:

Quick Check:

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