ExamAdept

What is the role of a getter method in encapsulation?

A:

To set the value of a private variable

B:

To retrieve the value of a private variable

C:

To create a new instance of a class

D:

To delete a private variable

Answer: B

A getter method in encapsulation is used to retrieve the value of a private variable.

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Which statement accurately describes the concept of encapsulation?

A:

Encapsulation involves exposing all implementation details of an object.

B:

Encapsulation is a mechanism for achieving multiple inheritances.

C:

Encapsulation combines data and methods into a single unit and hides implementation details.

D:

Encapsulation is only applicable to global variables.

Answer: C

Encapsulation in Python combines data and methods into a single unit and hides implementation details.

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In Python, what is the purpose of using a double underscore prefix in a method name, such as __method()?

A:

To define a private method

B:

To create a public method

C:

To indicate a class method

D:

To access a global method

Answer: A

The double underscore prefix in a method name in Python, such as __method(), is used to define a private method.

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Which keyword in Python is used to define a private variable within a class?

A:

private

B:

secret

C:

protected

D:

None of the above

Answer: D

In Python, there is no explicit keyword for defining private variables. Conventionally, a single or double underscore prefix is used to indicate privacy, but it is a convention and not a strict rule.

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Consider the following Python code:

class Product:
    def __init__(self, name, price):
        self._name = name
        self._price = price

    @property
    def get_price(self):
        return self._price

What is the purpose of the @property decorator in this code?

A:

To define a private variable

B:

To create a class instance

C:

To provide a getter method for a private variable

D:

To access a global variable

Answer: C

The @property decorator in this code is used to provide a getter method for the private variable _price.

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Questions for: Encapsulation