ExamAdept

Consider the following Python code:

class Car:
    def __init__(self, model, speed):
        self._model = model
        self._speed = speed

    def display_info(self):
        return f"Model: {self._model}, Speed: {self._speed} km/h"

What encapsulation concept is demonstrated in this code?

A:

Public access specifier

B:

Private access specifier

C:

Protected access specifier

D:

Global variable

Answer: B

The single underscore prefix (_) in the variables _model and _speed indicates that they are private variables, demonstrating encapsulation by hiding the implementation details.

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Which of the following access specifiers in Python allows a variable or method to be accessible within its own class and its subclasses?

A:

Public

B:

Private

C:

Protected

D:

Global

Answer: C

The protected access specifier in Python allows a variable or method to be accessible within its own class and its subclasses.

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Which of the following statements is true regarding encapsulation?

A:

It encourages exposing all internal details of an object.

B:

It is achieved through the use of global variables.

C:

It involves combining data and methods into a single unit and hiding implementation details.

D:

It promotes code complexity by making all variables public.

Answer: C

Encapsulation in Python involves combining data and methods into a single unit and hiding implementation details.

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What is the primary purpose of using encapsulation in object-oriented programming?

A:

To expose all implementation details of an object

B:

To hide the implementation details of an object and bundle data and methods into a single unit

C:

To create global variables for easy access

D:

To increase code complexity

Answer: B

The primary purpose of encapsulation is to hide the implementation details of an object and bundle data and methods into a single unit.

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In Python, what is the purpose of the @property decorator in a class?

A:

To create a new instance of a class

B:

To provide a getter method for a private variable

C:

To define a private variable

D:

To access a global variable

Answer: B

The @property decorator is used in Python to create a getter method for a private variable, allowing controlled access.

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Questions for: Encapsulation