LLD - Design — Splitwise (Expense Sharing)
Which of the following is the correct way to define a Group class that holds multiple User objects in Python?
Which of the following is the correct way to define a Group class that holds multiple User objects in Python?
easy🧠 Conceptual Q12 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify correct attribute for multiple users
A list is suitable to hold multiple User objects, so self.users = [] is correct.Step 2: Check other options for correctness
class Group: def __init__(self): self.user = {} uses a dict named user which is not typical for holding users; class Group: def __init__(self): self.expenses = [] uses expenses which belongs to Expense class; class Group: def __init__(self): self.members = None sets members to None which is not a collection.Final Answer:
class Group: def __init__(self): self.users = [] -> Option AQuick Check:
Group holds list of users = self.users = [] [OK]
Quick Trick: Group holds list of users with self.users = [] [OK]
Common Mistakes:
MISTAKES- Using dict instead of list for users
- Confusing expenses with users
- Initializing members as None instead of a list
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