ExamAdept

Which access specifier in Python is used to indicate that a variable or method should be accessible from anywhere, both within and outside the class?

A:

Public

B:

Private

C:

Protected

D:

Global

Answer: A

Public access specifier in Python is used to indicate that a variable or method should be accessible from anywhere, both within and outside the class.

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In Python, what is a getter method used for in the context of encapsulation?

A:

To set the value of a private variable

B:

To delete a private variable

C:

To retrieve the value of a private variable

D:

To define a new private variable

Answer: C

In encapsulation, a getter method is used to retrieve the value of a private variable.

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What is the purpose of the single underscore prefix in Python, as in _variable?

A:

To indicate a protected variable

B:

To indicate a private variable

C:

To indicate a global variable

D:

To indicate a constant variable

Answer: A

The single underscore prefix in Python, as in _variable, is used to indicate a protected variable.

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Consider the following Python code:

class BankAccount:
    def __init__(self, balance):
        self.__balance = balance

    def get_balance(self):
        return self.__balance

    def deposit(self, amount):
        self.__balance += amount

    def withdraw(self, amount):
        if amount <= self.__balance:
            self.__balance -= amount
            return True
        else:
            return False

What concept of encapsulation is demonstrated in this code?

A:

Public access specifier

B:

Private access specifier

C:

Protected access specifier

D:

Global variable

Answer: B

The double underscore prefix (__) in the variable __balance indicates that it is a private variable, demonstrating encapsulation by hiding the implementation details.

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Which access specifier in Python is used to indicate that a variable or method should be accessible by subclasses?

A:

Public

B:

Private

C:

Protected

D:

Global

Answer: C

Protected access specifier in Python is denoted by a single underscore (_), and it indicates that the variable or method should be accessible by subclasses.

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Questions for: Encapsulation