Which of the following is the correct way to declare a subclass Rook that inherits from Piece in a typical object-oriented language?

easy📝 Conceptual Q3 of 15

LLD - Design — Chess Game

Which of the following is the correct way to declare a subclass Rook that inherits from Piece in a typical object-oriented language?

Aclass Rook extends Piece { }

Bclass Rook inherits Piece { }

Cclass Rook implements Piece { }

Dclass Rook uses Piece { }

Step-by-Step Solution

Solution:

Step 1: Recall inheritance syntax
In many OOP languages like JavaScript and Java, 'extends' keyword is used for subclassing.
Step 2: Check other options
'inherits' and 'uses' are incorrect keywords; 'implements' is for interfaces, not classes.
Final Answer:
class Rook extends Piece { } -> Option A
Quick Check:
Subclass syntax = extends [OK]

Quick Trick: Use 'extends' to inherit from a class [OK]

Common Mistakes:

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