Which of the following is the correct way to define a base class Room with a subclass ConferenceRoom in a typical object-oriented design?
easy📝 Architecture Q12 of 15
LLD - Design — Hotel Booking System
Which of the following is the correct way to define a base class Room with a subclass ConferenceRoom in a typical object-oriented design?
Aclass Room {}; class ConferenceRoom extends Room {}
Bclass Room; class ConferenceRoom inherits Room
Cclass Room() {}; class ConferenceRoom() inherits Room()
Dclass Room {}; class ConferenceRoom inherits Room {}
Step-by-Step Solution
Solution:
Step 1: Identify correct syntax for inheritance
In many modern languages, extends is used to inherit from a base class.
Step 2: Check each option
class Room {}; class ConferenceRoom extends Room {} uses correct syntax: class ConferenceRoom extends Room {}. Others use incorrect or incomplete syntax.
Final Answer:
class Room {}; class ConferenceRoom extends Room {} -> Option A
Quick Check:
Inheritance syntax = extends [OK]
Quick Trick:Remember: subclass extends base class in OOP [OK]
Common Mistakes:
Using 'inherits' instead of 'extends'
Missing curly braces for class body
Incorrect parentheses in class declaration
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