Object-Oriented Programming Quizzes for Year 10 Computing

Question 1

What is the benefit of using polymorphism in OOP?

Accepted Answer

Allows objects of different classes to be treated as objects of a common superclass

Answer

Reduces code duplication

Answer

Improves program efficiency

Answer

Enhances program security

Question 2

In OOP, what is an example of a method?

Accepted Answer

A function that operates on an object

Answer

A variable that stores data about an object

Answer

A class that defines the structure of an object

Answer

An object that represents a real-world entity

Question 3

What is the purpose of a try-catch block in OOP?

Accepted Answer

To handle errors and exceptions

Answer

To control the flow of a program

Answer

To store data and methods related to an object

Answer

To define the blueprint for creating objects

Question 4

Why is code documentation important in OOP?

Accepted Answer

Improves code readability and maintainability

Answer

Ensures that code meets legal requirements

Answer

Improves code performance

Answer

Prevents unauthorized access to code

Question 5

Which of the following is a fundamental characteristic of object-oriented programming (OOP)?

Accepted Answer

Data is encapsulated within objects.

Answer

Code is organized into separate functions.

Answer

Programs are structured using global variables.

Answer

Objects cannot inherit properties from other objects.

Question 6

Which of the following scenarios demonstrates the concept of inheritance in OOP?

Accepted Answer

A 'Dog' class inherits properties and methods from an 'Animal' class.

Answer

A 'Circle' class inherits properties and methods from a 'Square' class.

Answer

An 'Employee' class inherits properties and methods from a 'Student' class.

Answer

A 'Teacher' class inherits properties and methods from a 'Principal' class.

Question 7

What is the significance of polymorphism in OOP?

Accepted Answer

Objects can exhibit different behaviors based on their class.

Answer

Objects can exist in multiple forms simultaneously.

Answer

Objects can be assigned to various data types.

Answer

Objects can be efficiently stored in a database.

Question 8

What is the fundamental difference between a class and an object in OOP?

Accepted Answer

A class is a template for creating objects, while an object is a specific instance of a class.

Answer

An object is a template for creating classes, while a class is a specific instance of an object.

Answer

A class and an object are essentially the same concept.

Answer

A class is a data type, while an object is a variable.

Question 9

What is the significance of encapsulation in OOP?

Accepted Answer

It protects data and maintains the integrity of objects.

Answer

It enhances the readability and understandability of code.

Answer

It improves the performance and efficiency of the program.

Answer

It reduces the memory footprint of the program.

Question 10

What is the primary purpose of using a constructor in a class?

Accepted Answer

To initialize the state of an object when it is created

Answer

To provide alternative ways to create an object

Answer

To define the methods that will be available for the object

Answer

To inherit properties from the parent class

Question 11

Which of the following demonstrates method overriding?

Accepted Answer

Redefining a method in a subclass that has the same name and signature as a method in the superclass

Answer

Calling a method from the superclass using the 'super' keyword

Answer

Creating a new method with a different name but similar functionality

Answer

Using polymorphism to call a method based on the object's type

Question 12

What is the primary reason for using the 'this' keyword in Java?

Accepted Answer

To refer to the current object instance

Answer

To invoke a constructor from another constructor

Answer

To access static members of a class

Answer

To create a new method with the same name as a method in a parent class

Question 13

Which of the following concepts is fundamental to object-oriented programming?

Accepted Answer

Classes

Answer

Variables

Answer

Conditional Statements

Answer

Loops

Question 14

What is the primary purpose of a constructor in a class?

Accepted Answer

To initialize the attributes of an object

Answer

To create a new object

Answer

To define the behavior of an object

Answer

To terminate the execution of an object

Question 15

Which of the following scenarios best demonstrates inheritance?

Accepted Answer

A class inherits properties and methods from another class

Answer

Two classes have the same name

Answer

A class defines its own unique properties and methods

Answer

A class has access to the private members of another class

Question 16

Which of the following best describes an advantage of polymorphism?

Accepted Answer

Allows objects of different classes to respond to the same message in different ways

Answer

Reduces the amount of code that needs to be written

Answer

Improves the maintainability of a program

Answer

Makes it easier to debug a program

Question 17

Which of the following is NOT a characteristic of an abstract class?

Accepted Answer

Cannot be instantiated

Answer

May contain abstract methods

Answer

May contain concrete methods

Answer

Can be inherited by other classes

Question 18

What is the main purpose of an interface in object-oriented programming?

Accepted Answer

To define a set of methods that a class must implement

Answer

To create a new class

Answer

To inherit properties and methods from a superclass

Answer

To encapsulate the data and methods of a class

Question 19

Which of the following is an example of a design pattern?

Accepted Answer

Factory Method

Answer

Array

Answer

Method

Answer

Loop

Question 20

What is a primary goal of object-oriented programming?

Accepted Answer

To create reusable and maintainable code

Answer

To increase program execution speed

Answer

To reduce the number of lines of code required

Answer

To improve the appearance of the user interface

Question 21

Which of the following is **NOT** a core concept of object-oriented programming?

Accepted Answer

Recursion

Answer

Encapsulation

Answer

Inheritance

Question 22

Identify the characteristic that does NOT belong to object-oriented programming:

Accepted Answer

Procedural programming

Answer

Encapsulation

Answer

Inheritance

Answer

Polymorphism

Question 23

In object-oriented programming, what is the primary function of a class?

Accepted Answer

To outline the structure and behavior of objects

Answer

To store information associated with objects

Answer

To run code

Answer

To receive user input

Question 24

Explain the fundamental difference between an object and a class in object-oriented programming:

Accepted Answer

An object is an instance of a class, while a class is a blueprint.

Answer

A class is an instance of an object, while an object is a blueprint.

Answer

Objects and classes are essentially the same.

Answer

An object is a data type, whereas a class is a function type.

Question 25

Define inheritance in the context of object-oriented programming:

Accepted Answer

Inheriting properties and methods from a parent class

Answer

Accessing private attributes of another object

Answer

Modifying methods inherited from a parent class

Answer

Enabling communication between objects

Question 26

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

Accepted Answer

Initializing an object upon creation

Answer

Allowing users to input data into an object

Answer

Destroying an object at the end of its lifespan

Answer

Enabling communication between objects

Question 27

Describe the purpose of an interface in object-oriented programming:

Accepted Answer

Establishing a contract of methods that classes must implement

Answer

Defining a set of data members that classes must possess

Answer

Providing a communication channel between classes

Answer

Storing objects in a database

Question 28

What is the primary purpose of a constructor in an object-oriented program?

Accepted Answer

To initialize an object's attributes

Answer

To define the object's methods

Answer

To create a new instance of the object

Answer

To set the object's access modifiers

Question 29

In Java, inheritance is demonstrated by which code snippet?

Accepted Answer

class Dog extends Animal {}

Answer

class Animal extends Dog {}

Answer

class Animal implements Dog {}

Answer

class Dog implements Animal {}

Question 30

What is the main benefit of polymorphism in object-oriented programming?

Accepted Answer

It enables objects of different classes to respond differently to the same message.

Answer

It ensures that all objects of the same class have identical behavior.

Answer

It prevents access to private members of a class.

Answer

It improves code reusability.

Question 31

How do a class and an object differ in object-oriented programming?

Accepted Answer

A class is a blueprint for creating objects, while an object is an instance of a class.

Answer

A class is a collection of objects, while an object is a member of a class.

Answer

A class is an abstract concept, while an object is a physical entity.

Answer

There is no distinction between a class and an object.

Question 32

Which access modifier in Java is used to restrict access to a class member?

Accepted Answer

private

Answer

public

Answer

protected

Answer

default

Question 33

What is the purpose of an interface in the Java programming language?

Accepted Answer

To define a contract that a class must implement

Answer

To create a new data type

Answer

To provide multiple inheritance

Answer

To group related classes together

Question 34

What is considered a potential drawback of using object-oriented design?

Accepted Answer

Increased complexity

Answer

Improved maintainability

Answer

Enhanced Reusability

Answer

Greater extensibility

Question 35

Which characteristic is NOT associated with object-oriented programming?

Accepted Answer

Procedural decomposition

Answer

Encapsulation

Answer

Inheritance

Answer

Polymorphism

Question 36

What is the primary purpose of a constructor in an object-oriented program?

Accepted Answer

To initialize an object's state

Answer

To define an object's behavior

Answer

To inherit properties from a parent class

Answer

To destroy an object

Question 37

Which of the following best describes encapsulation?

Accepted Answer

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

Answer

Allowing unrestricted access to an object's data and methods

Answer

Inheriting properties and methods from a parent class

Answer

Overriding methods in a child class

Question 38

What is the primary purpose of a method in an object-oriented program?

Accepted Answer

To define the behavior of an object

Answer

To store data for an object

Answer

To inherit properties from a parent class

Answer

To create new objects

Question 39

Which fundamental characteristic defines object-oriented programming?

Accepted Answer

Ability to create objects from classes

Answer

Emphasis on code rather than data

Answer

Use of static methods to perform tasks

Answer

Focus on procedural coding

Question 40

What is the primary function of a constructor in an object-oriented class?

Accepted Answer

Initializing object attributes

Answer

Providing access to private class members

Answer

Defining the behavior of the class

Answer

Handling input and output operations

Question 41

Which of the following is NOT a visibility modifier in Java?

Accepted Answer

internal

Answer

public

Answer

private

Answer

protected

Question 42

How are classes and objects distinct in object-oriented programming?

Accepted Answer

Class is a blueprint, while an object is an instance

Answer

Object is a blueprint, while a class is an instance

Answer

Class and object are interchangeable terms

Answer

Object is a characteristic of a class

Question 43

What is a key advantage of inheritance in object-oriented programming?

Accepted Answer

Code reusability

Answer

Enhanced security

Answer

Increased memory usage

Answer

Reduced flexibility

Question 44

Which term describes an object's ability to behave differently depending on its context?

Accepted Answer

Polymorphism

Answer

Encapsulation

Answer

Abstraction

Answer

Overloading

Question 45

Which programming language is widely used for object-oriented development?

Accepted Answer

Java

Answer

Assembly

Answer

Fortran

Answer

COBOL

Question 46

Which of the following is a fundamental concept of object-oriented programming?

Accepted Answer

Encapsulation

Answer

Functional programming

Answer

Declarative programming

Answer

Procedural programming

Question 47

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

Accepted Answer

To define a blueprint for creating objects

Answer

To store data and methods

Answer

To handle user input

Answer

To control the flow of the program

Question 48

What is a primary benefit of using inheritance in object-oriented programming?

Accepted Answer

Code reusability and maintainability

Answer

Reduced memory usage

Answer

Faster execution speed

Answer

Improved security

Question 49

Which of the following is an example of polymorphism in object-oriented programming?

Accepted Answer

Method overriding

Answer

Encapsulation

Answer

Abstraction

Answer

Method overloading

Question 50

What is a key difference between a constructor and a method in object-oriented programming?

Accepted Answer

Constructor initializes an object, while a method performs an action

Answer

Constructor has no return type, while a method has a return type

Answer

Constructor is called explicitly, while a method is called implicitly

Question 51

Which of the following is a best practice for designing classes in object-oriented programming?

Accepted Answer

Follow the Single Responsibility Principle

Answer

Avoid using interfaces

Answer

Use as many inheritance levels as possible

Answer

Make classes as large as possible

Question 52

Which of the following is an advantage of using interfaces in object-oriented programming?

Accepted Answer

Loose coupling between classes

Answer

Difficulty in testing

Answer

Increased code complexity

Answer

Reduced performance

Question 53

What is a key distinction between a shallow copy and a deep copy in object-oriented programming?

Accepted Answer

Shallow copy copies references, while deep copy copies actual objects

Answer

Deep copy is used for immutable objects

Answer

Shallow copy is faster than deep copy