Which of the following is true about inheritance?

It allows a child class to inherit properties of a parent class

What is polymorphism in OOP?

function, method, or operator behave differently based on the context

What is a key benefit of using OOP?

It organizes code into objects, making it easier to manage and modify

Which of the following best defines Object-Oriented Programming (OOP)?

A programming paradigm focused on objects containing data and behavior

Why is OOP important for data science?

Many Python libraries like pandas and scikit-learn use OOP principles

Which of the following is true about an abstract method?

It must be overridden in a derived class

What is encapsulation in OOP?

A mechanism to restrict direct access to class attributes

What is the purpose of the __str__() method in a Python class?

It converts the object into a string representation

What is instantiating a class?

Creating an object from a class

How do you create an object in Python from a class?

By defining a variable and calling the class name with parentheses

What is a method in a Python class?

A function defined inside a class

What is the main advantage of encapsulation?

It provides security by hiding implementation details

What does "object-oriented" mean?

Being functionally directed towards modeling objects

What is the purpose of the __init__ method in Python?

It initializes an object’s attributes when it is created

What is abstraction in OOP?

Hiding the internal implementation and exposing only the necessary details

What is a class in Python?

A collection of related data and functions that define objects

What does the self parameter represent in a class method?

The current instance of the class

Which keyword is used to define a private attribute in Python?

_ or __ (underscore or double underscore)

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Answers

1
Which of the following is true about inheritance?
It allows a child class to inherit properties of a parent class
It restricts code reusability
It is only used for abstract classes
It prevents method overriding
2
What is polymorphism in OOP?
The process of converting one object into another
function, method, or operator behave differently based on the context
The restriction of access to certain data in a class
The process of defining multiple constructors
3
A class can inherit from multiple classes in Python.
True
False
4
What is a key benefit of using OOP?
It only works for small programs
It makes the code harder to debug
It organizes code into objects, making it easier to manage and modify
It removes the need for functions
5
Which of the following best defines Object-Oriented Programming (OOP)?
A database management technique
A way to write functions without using objects
A programming paradigm focused on objects containing data and behavior
A method for sorting algorithms
6
Why is OOP important for data science?
Many Python libraries like pandas and scikit-learn use OOP principles
OOP is only used in web development
OOP is the only way to perform data analysis
OOP makes programming more difficult, so data scientists avoid it
7
A private attribute in Python can be accessed directly outside the class.
True
False
8
Which of the following is true about an abstract method?
It cannot have any method definition
It must be overridden in a derived class
It must have an implementation in the base class
It can be called directly from an abstract class
9
Polymorphism allows the same operator or function to have different meanings in different contexts.
False
True
10
What is encapsulation in OOP?
Inheriting properties from another class
The process of creating multiple functions with the same name
A mechanism to restrict direct access to class attributes
The ability of a function to operate on different data types
11
What is the purpose of the __str__() method in a Python class?
It defines the class
It converts the object into a string representation
It initializes object attributes
It deletes an object from memory
12
How do you access an attribute of a class object in Python?
object_name.attribute_name
object_name[attribute_name]
object_name->attribute_name
object_name:attribute_name
13
What is instantiating a class?
Writing a class definition
Writing a function inside a class
Deleting a class
Creating an object from a class
14
What is the correct syntax for defining a derived class?
class ChildClass(ParentClass):
class ParentClass(ChildClass):
def ChildClass -> ParentClass:
class ChildClass extends ParentClass:
15
Encapsulation allows data to be directly accessed from outside the class.
False
True
16
How do you create an object in Python from a class?
By using the object.create() method
By defining a variable and calling the class name with parentheses
By using the def object() function
By writing new Object(class_name)
17
What is a method in a Python class?
A function defined inside a class
A reserved keyword in Python
A special type of variable
A separate program that runs Python code
18
What is the main advantage of encapsulation?
It makes variables global
It allows multiple inheritance
It enables overloading of methods
It provides security by hiding implementation details
19
What does "object-oriented" mean?
A method of sorting objects
Being functionally directed towards modeling objects
A way to create complex mathematical formulas
A way to physically interact with software
20
What is the purpose of the __init__ method in Python?
It deletes an object
It is used to print the object
It initializes an object’s attributes when it is created
It defines a class
21
What is abstraction in OOP?
Hiding the internal implementation and exposing only the necessary details
Creating multiple instances of a class
Overloading functions in the same class
A process of converting one data type into another
22
What is a class in Python?
A collection of related data and functions that define objects
A special data type for mathematical operations
A function that executes code
A single object with unique properties
23
What does the self parameter represent in a class method?
The current instance of the class
A required argument for all functions
The class itself
A global variable
24
Which keyword is used to define a private attribute in Python?
public
private
_ or __ (underscore or double underscore)
protected
25
Inheritance helps in reducing redundancy in code by reusing the properties of an existing class.
True
False

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