Quiz LibraryJava OOPs Concepts in just 60 minutes | Object Oriented Programming | Java Tutorial For Beginners
Created from Youtube video: https://www.youtube.com/watch?v=a199KZGMNxkvideo
Concepts covered:Inheritance, Encapsulation, Polymorphism, Abstraction, Classes
The video provides a comprehensive overview of Java's Object-Oriented Programming (OOP) concepts, including inheritance, classes, objects, encapsulation, abstraction, and polymorphism. It explains these concepts with practical examples and demonstrates how to implement them in Java, making it accessible for beginners.
Table of Contents1.Understanding Protected Access and Encapsulation2.Encapsulation and Access Control with Getters and Setters3.Understanding Abstraction in Programming4.Understanding Abstraction in Object-Oriented Programming5.Understanding Interfaces and Abstraction in Java
chapter
1
Understanding Protected Access and Encapsulation
Concepts covered:protected, access modifier, data hiding, encapsulation, security
The chapter explains the concept of the 'protected' access modifier, which allows only child classes to access certain properties or methods of a parent class, even if they are in different packages. It also discusses encapsulation, which involves combining variables and methods into a single unit to enhance data security and prevent unauthorized access.
Question 1
Encapsulation involves combining variables and methods into a single unit.
Question 2
What is encapsulation in programming?
Question 3
What does the protected access modifier allow?
Question 4
CASE STUDY: A software company is developing a library management system. The 'Book' class has attributes like 'title', 'author', and 'ISBN'. The company wants only derived classes (e.g., 'EBook' and 'PrintedBook') to access the 'ISBN' attribute, but not any other external classes.
All of the following are correct applications of access modifiers except...
Question 5
CASE STUDY: In a banking application, the 'Account' class has attributes such as 'accountNumber', 'balance', and 'accountHolder'. The bank wants to ensure that only derived classes (e.g., 'SavingsAccount' and 'CurrentAccount') can access the 'balance' attribute, but not any other external classes.
Select three correct applications of access modifiers out of the following...
chapter
2
Encapsulation and Access Control with Getters and Setters
Concepts covered:encapsulation, Getters and Setters, access control, validation, admin
The chapter explains the concept of encapsulation in programming, focusing on the use of Getters and Setters to control access to class properties. It emphasizes the importance of validation and access control, particularly for sensitive data like price, ensuring only authorized users like admins can modify it.
Question 6
Encapsulation involves restricting direct access to object properties.
Question 7
How do you access a private property in a class?
Question 8
What is the primary purpose of encapsulation?
Question 9
CASE STUDY: A company has developed a new software application where only administrators should be able to modify the application's settings. They want to ensure that unauthorized users cannot change these settings.
All of the following are correct applications of encapsulation except...
Question 10
CASE STUDY: A software team is implementing a user management system where certain data should be hidden and only accessible through specific methods.
Select three correct uses of getters and setters out of the following...
chapter
3
Understanding Abstraction in Programming
Concepts covered:abstraction, complexity, OOP, Java, interfaces
The chapter explains the concept of abstraction in programming, emphasizing how it hides the complexities of a system from the user. It discusses the importance of abstraction in object-oriented programming (OOP) and introduces Java's abstract keyword and interfaces as tools to achieve it.
Question 11
Abstraction in OOPS is achieved using inheritance.
Question 12
Which Java feature helps achieve abstraction?
Question 13
What is the primary purpose of abstraction?
Question 14
CASE STUDY: A software company is developing a new mobile application. The developers want to ensure that users can easily navigate the app without understanding the underlying code and logic.
All of the following are correct applications of abstraction except...
Question 15
CASE STUDY: A financial institution is designing an online banking platform. They want to ensure that users can perform transactions without needing to understand the backend processes.
Select three correct applications of abstraction out of the following...
chapter
4
Understanding Abstraction in Object-Oriented Programming
Concepts covered:abstraction, abstract class, abstract method, object-oriented programming, inheritance
The chapter explains the concept of abstraction in object-oriented programming using the example of a car. It illustrates how abstract classes and methods work, emphasizing that abstract classes cannot be instantiated and their abstract methods must be implemented by subclasses.
Question 16
Abstract methods must be implemented by subclasses.
Question 17
Why can't you instantiate an abstract class?
Question 18
What must subclasses of an abstract class implement?
Question 19
CASE STUDY: A software company is developing a vehicle management system. They have created an abstract class 'Vehicle' with properties like 'price' and an abstract method 'start'. They have derived two classes 'Car' and 'Bike' from 'Vehicle'.
All of the following are correct applications of 'Vehicle' class except...
Question 20
CASE STUDY: A car rental service is using an abstract class 'Car' to represent different car models. The 'Car' class has an abstract method 'start'. They have created 'SUV' and 'Convertible' classes extending 'Car'.
Select three correct statements about 'Car' class.
chapter
5
Understanding Interfaces and Abstraction in Java
Concepts covered:interfaces, implements, abstraction, multiple inheritance, Java
This chapter explains the concept of interfaces in Java, highlighting the use of the 'implements' keyword and the differences between abstract classes and interfaces. It also discusses the limitations of multiple inheritance in Java and how interfaces provide a solution to this problem.
Question 21
Java supports multiple inheritance through interfaces.
Question 22
How can a class achieve multiple inheritance?
Question 23
Why can't you instantiate an abstract class?
Question 24
CASE STUDY: You are tasked with creating a Java application where a class needs to inherit properties from multiple sources without encountering the diamond problem.
All of the following are true about interfaces except...
Question 25
CASE STUDY: You are working on a Java application and need to ensure that a class cannot have multiple immediate parents.
Select three correct reasons for using interfaces out of the following...

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