ExamAdept

How does encapsulation contribute to code maintenance?

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 maintenance in Python by combining data and methods into a single unit, making the code more modular and easier to manage.

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Which of the following is a common guideline when using encapsulation?

A:

Avoid using private variables altogether.

B:

Make all variables public for ease of access.

C:

Provide getter and setter methods for private variables as needed.

D:

Use global variables extensively.

Answer: C

A common guideline when using encapsulation is to provide getter and setter methods for private variables as needed to control access.

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In Python, what is a potential drawback of using encapsulation?

A:

Reduced code modularity

B:

Increased code complexity

C:

Enhanced data security

D:

Improved code readability

Answer: B

A potential drawback of using encapsulation in Python is increased code complexity, especially if not managed properly.

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What is the purpose of the @property decorator in encapsulation?

A:

To create a new instance of a class

B:

To provide a getter method for a private variable

C:

To access a global variable

D:

To define a private variable

Answer: B

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

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Consider the following Python code:

class Student:
    def __init__(self, name, age):
        self._name = name
        self._age = age

    def get_name(self):
        return self._name

    def set_age(self, new_age):
        if new_age >= 0:
            self._age = new_age

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

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Questions for: Encapsulation