ExamAdept

What is the role of the @classmethod decorator in encapsulation?

A:

To define a private variable

B:

To create a class instance

C:

To provide a class method for a class

D:

To access a global variable

Answer: C

The @classmethod decorator is used in encapsulation to provide a class method for a class, allowing functionality related to the class.

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How does encapsulation contribute to code maintainability in object-oriented programming?

A:

By exposing all implementation details of an object

B:

By combining data and methods into a single unit

C:

By allowing unrestricted access to internal details of an object

D:

By hiding the implementation details of an object

Answer: B

Encapsulation contributes to code maintainability by combining data and methods into a single unit, making the code more modular and easier to manage.

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Which access specifier in Python is used to indicate that a variable or method should not be accessed from outside the class?

A:

Public

B:

Private

C:

Protected

D:

Global

Answer: B

Private access specifier in Python is used to indicate that a variable or method should not be accessed from outside the class.

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What is the primary purpose of encapsulation?

A:

To allow unrestricted access to class members

B:

To combine data and methods into a single unit

C:

To create multiple instances of a class

D:

To expose all implementation details of an object

Answer: B

The primary purpose of encapsulation in Python is to combine data and methods into a single unit, promoting modularity.

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Consider the following Python code:

class Employee:
    def __init__(self, name, salary):
        self._name = name
        self._salary = salary

    def get_salary(self):
        return self._salary

    def set_salary(self, new_salary):
        if new_salary > 0:
            self._salary = new_salary

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: C

The single underscore prefix (_) in the variables _name and _salary indicates that they are protected variables, demonstrating encapsulation by hiding the implementation details.

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Questions for: Encapsulation