LLD - Design — Chess Game
Why is it important to keep the
Piece class hierarchy open for extension but closed for modification in board game design?Why is it important to keep the Piece class hierarchy open for extension but closed for modification in board game design?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand open-closed principle
It states software entities should be open for extension but closed for modification.Step 2: Apply to piece hierarchy
This allows adding new piece types by subclassing without changing tested existing code.Final Answer:
To allow adding new pieces without changing existing code -> Option CQuick Check:
Open-closed principle = extend without modify [OK]
Quick Trick: Extend classes, don't modify existing ones [OK]
Common Mistakes:
- Thinking no new pieces allowed
- Believing entire rewrite is needed
- Making base class too complex
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