Question 1

What is a class in object-oriented programming?

Accepted Answer

A blueprint for creating objects

Answer

An error in the code

Answer

A type of variable

Answer

A function to perform actions

Question 2

What is an object in programming?

Accepted Answer

An instance of a class

Answer

A collection of methods

Answer

A type of function

Answer

A variable that stores data

Question 3

What does encapsulation mean in the context of classes?

Accepted Answer

Hiding the internal state of an object

Answer

Combining different classes together

Answer

Creating multiple instances of a class

Answer

Defining strange variable names

Question 4

Which of the following describes inheritance in object-oriented programming?

Accepted Answer

A mechanism where one class derives properties and behaviors from another class

Answer

Combining multiple variables into one

Answer

Creating new functions in a class

Answer

A way to avoid using classes

Question 5

What is a constructor in a class?

Accepted Answer

A special method that initializes an object

Answer

A function that performs calculations

Answer

A variable that stores data

Answer

A way to delete a class

Question 6

What is a method in the context of a class?

Accepted Answer

A function defined within a class that describes an action

Answer

An error handling mechanism

Answer

A variable that holds values

Answer

A type of class

Question 7

What is an attribute in terms of a class?

Accepted Answer

A property that stores data about an object

Answer

An error in the code

Answer

A method that performs actions

Answer

A class that contains other classes

Question 8

What is polymorphism in object-oriented programming?

Accepted Answer

The ability to treat objects of different classes through a common interface

Answer

The process of merging two classes

Answer

Creating multiple classes in the same file

Answer

A way to avoid using objects

Question 9

What is the difference between a class and an object?

Accepted Answer

A class is a blueprint while an object is a specific instance of that blueprint

Answer

A class is created from an object

Answer

An object cannot have attributes, but a class can

Answer

A class is a type of function while an object is data

Question 10

What is the purpose of access modifiers in a class?

Accepted Answer

To control the visibility and accessibility of class members

Answer

To initialize variables

Answer

To define functions

Answer

To create new classes

Question 11

What is the purpose of a class in object-oriented programming?

Accepted Answer

To define a blueprint for creating objects

Answer

To store data in a database

Answer

To write executable statements

Answer

To perform mathematical calculations

Question 12

In object-oriented programming, what is an object?

Accepted Answer

An instance of a class

Answer

A type of function

Answer

A keyword in programming

Answer

A variable in a program

Question 13

What concept in object-oriented programming allows one class to inherit properties and methods from another class?

Accepted Answer

Inheritance

Answer

Polymorphism

Answer

Abstraction

Answer

Encapsulation

Question 14

What is encapsulation in object-oriented programming?

Accepted Answer

The bundling of data and methods that operate on that data within a single unit

Answer

The inheritance of properties from one class to another

Answer

The process of creating algorithms

Answer

The ability to change an object's behavior at runtime

Question 15

What is polymorphism in the context of object-oriented programming?

Accepted Answer

The ability for different classes to be treated as instances of the same class through a common interface

Answer

The process of compiling code into machine language

Answer

The creation of new classes from existing ones

Answer

The hiding of object data

Question 16

What is a constructor in object-oriented programming?

Accepted Answer

A special method used to initialize objects of a class

Answer

A method that deletes objects

Answer

A function that performs calculations

Answer

A way to define class variables

Question 17

What does it mean for a method to be 'overloaded' in object-oriented programming?

Accepted Answer

Multiple methods with the same name but different parameters

Answer

A method that is run automatically when the program starts

Answer

A method that cannot be modified

Answer

A method that performs multiple tasks

Question 18

What is an instance variable in a class?

Accepted Answer

A variable that is specific to an object created from the class

Answer

A variable shared by all instances of the class

Answer

A variable that cannot be accessed outside its method

Answer

A method defined in the class

Question 19

What is the purpose of the 'this' keyword in a class?

Accepted Answer

To refer to the current object within the class

Answer

To call a superclass method

Answer

To create a new instance of a class

Answer

To declare a static variable

Question 20

What is an abstract class in object-oriented programming?

Accepted Answer

A class that cannot be instantiated and is designed to be subclassed

Answer

A class that contains only static methods

Answer

A class that can be directly instantiated

Answer

A class that has no properties

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