LLD - Design — Splitwise (Expense Sharing)
Why is it important to separate User, Group, and Expense classes in a shared expense system design?
Why is it important to separate User, Group, and Expense classes in a shared expense system design?
hard🧠 Conceptual Q10 of Q15
Step-by-Step Solution
Solution:
Step 1: Recall design principles
Single Responsibility Principle states each class should have one responsibility.Step 2: Benefits of separation
Separating classes improves clarity, maintenance, and scalability.Final Answer:
To ensure single responsibility and easier maintenance -> Option AQuick Check:
Separation = Single Responsibility [OK]
Quick Trick: Separate classes for clear roles and easier updates [OK]
Common Mistakes:
MISTAKES- Thinking fewer classes is always better
- Trying to put all data in one class
- Confusing separation with inheritance avoidance
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