Question

You want to store a private attribute __balance in a BankAccount class and allow safe updating only through a method that adds money. Which code snippet correctly implements this?

Accepted Answer

class BankAccount:
    def __init__(self):
        self.__balance = 0
    def add_money(self, amount):
        self.__balance += amount
    def get_balance(self):
        return self.__balance

Answer

class BankAccount:
    def __init__(self):
        self._balance = 0
    def add_money(self, amount):
        self._balance += amount
    def get_balance(self):
        return self._balance

Answer

class BankAccount:
    def __init__(self):
        self.balance = 0
    def add_money(self, amount):
        self.balance += amount
    def get_balance(self):
        return self.balance

Answer

class BankAccount:
    def __init__(self):
        self.__balance = 0
    def add_money(self, amount):
        self.balance += amount
    def get_balance(self):
        return self.__balance

You want to store a private attribute __balance in a BankAccount class and allow safe updating only through a method that adds money. Which code snippet correctly implements this?

Step 1: Check private attribute usage

Step 2: Verify method updates and access

Final Answer:

Quick Check:

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