LLD - Design — Splitwise (Expense Sharing)
Which class should contain the method to add a new user to a group in a shared expense system?
Which class should contain the method to add a new user to a group in a shared expense system?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the role of Group class
The Group class manages collections of users, so adding a user logically belongs here.Step 2: Identify the appropriate class for user management
User class represents individual users, Expense class handles costs, so neither manages group membership.Final Answer:
Group class -> Option CQuick Check:
Adding user to group = Group class [OK]
Quick Trick: Group manages users, so add user method belongs there [OK]
Common Mistakes:
- Trying to add user in User class
- Adding user in Expense class
- Confusing database with class responsibility
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