Inheritance in Object-Oriented Programming: Interactive Learning Quizzes

Question 1

Which of the following correctly describes a key benefit of inheritance in object-oriented programming?

Accepted Answer

Promotes code reusability and reduces development time

Answer

Optimizes program performance by reducing processing overhead

Answer

Minimizes memory usage by avoiding duplicate code storage

Answer

Enhances code flexibility by making it easier to modify functionality

Question 2

In object-oriented programming, which access modifier allows subclasses to access protected members of their superclasses?

Accepted Answer

protected

Answer

private

Answer

public

Answer

default

Question 3

Which method is used in Java to override an inherited method from a superclass?

Accepted Answer

override()

Answer

overwrite()

Answer

super()

Answer

extend()

Question 4

Identify a potential disadvantage associated with the use of inheritance in object-oriented programming:

Accepted Answer

Increased code complexity and potential for errors

Answer

Reduced code flexibility and maintainability

Answer

Increased memory consumption due to object duplication

Answer

Reduced code reusability and sharing

Question 5

Which access modifier should be used to declare a method in a superclass that can only be accessed by its subclasses?

Accepted Answer

protected

Answer

private

Answer

public

Answer

default

Question 6

Which inheritance type enables a subclass to inherit attributes and methods from more than one superclass?

Accepted Answer

Multiple Inheritance

Answer

Multilevel Inheritance

Answer

Single Inheritance

Answer

Hierarchical Inheritance

Question 7

What is a potential drawback of using inheritance in software development?

Accepted Answer

Increased code complexity

Answer

Reduced memory usage

Answer

Improved reusability

Question 8

Which of the following is a potential limitation of inheritance in Java?

Accepted Answer

Increased coupling between classes

Answer

Code reusability

Answer

Improved code maintainability

Answer

Reduced code complexity

Question 9

What is the main purpose of using the 'super' keyword in a subclass?

Accepted Answer

To invoke the constructor of the parent class and initialize inherited attributes

Answer

To access private members of the parent class that would otherwise be inaccessible

Answer

To override methods of the parent class and provide specialized implementations

Answer

To create a new instance of the parent class within the subclass

Question 10

Which of the following is a characteristic of method overriding?

Accepted Answer

Redefining the behavior of an inherited method with a new implementation in the subclass

Answer

Creating a new method with the same name as an existing method in the parent class, leading to ambiguity

Answer

Overloading a method by providing multiple implementations with different parameter lists

Answer

Calling a method from the parent class within the subclass without modifying its behavior

Question 11

What is the fundamental difference between inheritance and composition?

Accepted Answer

Inheritance establishes an 'is-a' relationship, while composition establishes a 'has-a' relationship

Answer

Composition establishes an 'is-a' relationship, while inheritance establishes a 'has-a' relationship

Answer

Inheritance and composition are interchangeable concepts with no significant distinction

Answer

Composition allows for multiple inheritance, while inheritance does not

Question 12

True or False: In Java, a subclass can inherit from multiple parent classes, allowing for multiple inheritance.

Accepted Answer

False

Answer

True

Question 13

What is the role of the 'protected' access modifier in the context of inheritance?

Accepted Answer

Grants access to members within the class and subclasses, restricting access from external classes

Answer

Grants access to members within the class, subclasses, and outside packages, providing the widest visibility

Answer

Grants access to members within the class only, providing the narrowest visibility

Answer

Prohibits access to members from external classes, ensuring encapsulation and data protection

Question 14

Which of the following is NOT a valid reason to use inheritance in object-oriented programming?

Accepted Answer

To enhance security by restricting access to sensitive data and methods

Answer

To share common functionality between classes, promoting code reuse

Answer

To create specialized classes with unique behavior, extending existing functionality

Answer

To avoid code duplication by eliminating the need for multiple implementations of similar code

Question 15

In object-oriented programming, what does inheritance allow a class to do?

Accepted Answer

Inherit attributes and methods from another class.

Answer

Only inherit attributes from another class.

Answer

Only inherit methods from another class.

Question 16

What is the primary purpose of using the 'super' keyword in a subclass?

Accepted Answer

To invoke the constructor of the parent class.

Answer

To access a particular attribute from the parent class.

Answer

To override a method in the parent class.

Answer

To call a specific method from the parent class.

Question 17

Which of the following is a potential drawback of using inheritance?

Accepted Answer

Increased code complexity

Answer

Improved extensibility

Answer

Easier maintenance

Answer

Code reusability

Question 18

What is a key difference between an abstract class and an interface?

Accepted Answer

An interface cannot provide method implementations, while an abstract class can.

Answer

An interface can inherit from multiple classes, while an abstract class cannot.

Answer

An abstract class cannot have attributes, while an interface can.

Question 19

Which code snippet correctly overrides the 'calculateArea' method in the 'Circle' subclass?

Accepted Answer

public double calculateArea() { return Math.PI * radius * radius; }

Answer

public double calculateArea() { return Math.PI * diameter * diameter; }

Answer

double calculateArea() { return Math.PI * radius * radius; }

Question 20

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

Accepted Answer

It allows objects of different classes to respond to the same method call in a manner specific to their respective classes.

Answer

It enables objects to possess multiple data types.

Question 21

What is the purpose of the 'protected' access modifier in the context of inheritance?

Accepted Answer

To grant access to attributes and methods within the subclass and any subclasses that extend it.

Answer

To restrict access to attributes and methods within the subclass only.

Answer

To restrict access to attributes and methods within the parent class only.

Question 22

What is the term used to describe a class that inherits from more than one parent class?

Accepted Answer

Multiple inheritance

Answer

Multilevel inheritance

Answer

Hierarchical inheritance

Answer

Hybrid inheritance