ExamAdept

Consider the following Python code:

class Customer:
    def __init__(self, name, email):
        self._name = name
        self._email = email

    def display_info(self):
        return f"Name: {self._name}, Email: {self._email}"

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 _email indicates that they are private variables, demonstrating encapsulation by hiding the implementation details.

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What is the purpose of using encapsulation?

A:

To increase code complexity

B:

To combine data and methods into a single unit

C:

To expose all implementation details of an object

D:

To make all variables public for easy access

Answer: B

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

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In Python, what is the purpose of the __str__() method in a class?

A:

To create a new instance of a class

B:

To define a private variable

C:

To provide a string representation of the object

D:

To access a global variable

Answer: C

The __str__() method in Python is used to provide a string representation of the object when the str() function is called.

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Which of the following is a benefit of encapsulation?

A:

Increased code complexity

B:

Improved code reusability

C:

Reduced data security

D:

Unrestricted access to internal details

Answer: B

Encapsulation in Python promotes improved code reusability by encapsulating data and methods into a single unit.

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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):
        if amount > 0:
            self.__balance += amount

What is the encapsulation concept 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 the encapsulation concept of private access.

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Questions for: Encapsulation