Inheritance in Java Quiz

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What is the purpose of the `dispContact()` method in the `Person` class?

To set the contact information of a `Person` object

To get the contact information of a `Person` object

To print the contact information of a `Person` object (correct)

To delete the contact information of a `Person` object

Which of the following is a correct statement about the visibility of class members in Java inheritance?

Public class members are not accessible by subclasses

Private class members are accessible by subclasses

Protected class members are accessible by subclasses (correct)

Default class members are accessible by subclasses

What is the relationship between the `Person`, `Employee`, and `Customer` classes in the given code?

The `Employee` and `Customer` classes inherit from the `Person` class (correct)

The `Person` class inherits from the `Employee` and `Customer` classes

The `Employee` and `Customer` classes are independent of the `Person` class

The `Employee` class inherits from the `Customer` class, and both inherit from the `Person` class

What is the purpose of the `empID` and `designation` fields in the `Employee` class?

To store the employee's identification and job title Signup and view all the answers

What is the purpose of the `customerID` and `invoiceNo` fields in the `Customer` class?

To store the customer's identification and invoice number Signup and view all the answers

What is the significance of the statement 'OOP Java is the easiest, scoring and my favorite subject' in the given text?

It is a statement made by a student about their experience with Java programming Signup and view all the answers

What does polymorphism refer to in object-oriented programming?

The ability of an object to take on many forms Signup and view all the answers

Which access modifier allows a class to be accessed from anywhere?

Public Signup and view all the answers

Why is multiple and hybrid inheritance not supported in Java?

To avoid the Diamond Problem Signup and view all the answers

What is the superclass of every other class in Java?

Object Signup and view all the answers

Can a class extend more than one class in Java?

No, Java does not support multiple inheritance Signup and view all the answers

What does the term 'Polymorphism' mean in object-oriented programming?

The ability of a method to do different things based on the object calling it Signup and view all the answers

What is the purpose of the `r` variable in the code snippet?

To store a reference of type <code>A</code> Signup and view all the answers

What is the output of the code snippet?

inside class A, inside class B, inside class C Signup and view all the answers

What is the purpose of the `if` statement in the `MyProg` class?

To assign the appropriate <code>Game</code> object to the <code>g</code> variable based on user input Signup and view all the answers

What is the purpose of the `type()` method in the `Game` class and its subclasses?

To print the type of the game Signup and view all the answers

What is the relationship between the `Game` class and its subclasses?

The <code>Game</code> class and its subclasses are all concrete classes Signup and view all the answers

What is the purpose of the `Scanner` object in the `MyProg` class?

To read user input and store it in the <code>op</code> variable Signup and view all the answers

Which type of polymorphism is achieved through method overloading in Java?

Compile-time Polymorphism Signup and view all the answers

In method overriding, what relationship must exist between the classes containing the overridden method?

IS-A (Inheritance) relationship Signup and view all the answers

What is the main advantage of dynamic method dispatch in Java?

Enables run-time polymorphism Signup and view all the answers

Which type of polymorphism is associated with dynamic method dispatch in Java?

Run-time Polymorphism Signup and view all the answers

How does method overloading differ from method overriding?

Method overloading uses different parameter types or number of parameters; overriding uses the same parameter types. Signup and view all the answers

Why does Java prohibit assigning a parent class object reference to a child class object directly?

To avoid ambiguity in method resolution during dynamic method dispatch. Signup and view all the answers

What is the purpose of the `VehicleInterface` in the given code?

To define a contract that must be implemented by any class representing a vehicle Signup and view all the answers

What is the significance of the `implements` keyword in the `CarClass` declaration?

It forces <code>CarClass</code> to provide implementations for all methods defined in <code>VehicleInterface</code> Signup and view all the answers

What is the purpose of the line `VehicleInterface CarClass c = new CarClass();` in the `DemoInterface` class?

It creates a new instance of <code>CarClass</code> and assigns it to a variable of type <code>VehicleInterface</code> Signup and view all the answers

What is the purpose of the `final` keyword in the declaration `int a = 10;` within the `VehicleInterface`?

It makes the variable <code>a</code> constant and unchangeable Signup and view all the answers

What is the output of the given code?

Left Signup and view all the answers

Which statement is true about methods declared in an interface?

They are implicitly <code>public</code> and <code>abstract</code> Signup and view all the answers

Inheritance in Java Quiz

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Questions and Answers

What is the purpose of the `dispContact()` method in the `Person` class?

Which of the following is a correct statement about the visibility of class members in Java inheritance?

What is the relationship between the `Person`, `Employee`, and `Customer` classes in the given code?

What is the purpose of the `empID` and `designation` fields in the `Employee` class?

What is the purpose of the `customerID` and `invoiceNo` fields in the `Customer` class?

What is the significance of the statement 'OOP Java is the easiest, scoring and my favorite subject' in the given text?

What does polymorphism refer to in object-oriented programming?

Which access modifier allows a class to be accessed from anywhere?

Why is multiple and hybrid inheritance not supported in Java?

What is the superclass of every other class in Java?

Can a class extend more than one class in Java?

What does the term 'Polymorphism' mean in object-oriented programming?

What is the purpose of the `r` variable in the code snippet?

What is the output of the code snippet?

What is the purpose of the `if` statement in the `MyProg` class?

What is the purpose of the `type()` method in the `Game` class and its subclasses?

What is the relationship between the `Game` class and its subclasses?

What is the purpose of the `Scanner` object in the `MyProg` class?

Which type of polymorphism is achieved through method overloading in Java?

In method overriding, what relationship must exist between the classes containing the overridden method?

What is the main advantage of dynamic method dispatch in Java?

Which type of polymorphism is associated with dynamic method dispatch in Java?

How does method overloading differ from method overriding?

Why does Java prohibit assigning a parent class object reference to a child class object directly?

What is the purpose of the `VehicleInterface` in the given code?

What is the significance of the `implements` keyword in the `CarClass` declaration?

What is the purpose of the line `VehicleInterface CarClass c = new CarClass();` in the `DemoInterface` class?

What is the purpose of the `final` keyword in the declaration `int a = 10;` within the `VehicleInterface`?

What is the output of the given code?

Which statement is true about methods declared in an interface?

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Inheritance in Java Quiz

Choose a study mode

Podcast

Questions and Answers

What is the purpose of the dispContact() method in the Person class?

Which of the following is a correct statement about the visibility of class members in Java inheritance?

What is the relationship between the Person, Employee, and Customer classes in the given code?

What is the purpose of the empID and designation fields in the Employee class?

What is the purpose of the customerID and invoiceNo fields in the Customer class?

What is the significance of the statement 'OOP Java is the easiest, scoring and my favorite subject' in the given text?

What does polymorphism refer to in object-oriented programming?

Which access modifier allows a class to be accessed from anywhere?

Why is multiple and hybrid inheritance not supported in Java?

What is the superclass of every other class in Java?

Can a class extend more than one class in Java?

What does the term 'Polymorphism' mean in object-oriented programming?

What is the purpose of the r variable in the code snippet?

What is the output of the code snippet?

What is the purpose of the if statement in the MyProg class?

What is the purpose of the type() method in the Game class and its subclasses?

What is the relationship between the Game class and its subclasses?

What is the purpose of the Scanner object in the MyProg class?

Which type of polymorphism is achieved through method overloading in Java?

In method overriding, what relationship must exist between the classes containing the overridden method?

What is the main advantage of dynamic method dispatch in Java?

Which type of polymorphism is associated with dynamic method dispatch in Java?

How does method overloading differ from method overriding?

Why does Java prohibit assigning a parent class object reference to a child class object directly?

What is the purpose of the VehicleInterface in the given code?

What is the significance of the implements keyword in the CarClass declaration?

What is the purpose of the line VehicleInterface CarClass c = new CarClass(); in the DemoInterface class?

What is the purpose of the final keyword in the declaration int a = 10; within the VehicleInterface?

What is the output of the given code?

Which statement is true about methods declared in an interface?

More Like This

Java OOP Quiz: Test Your Object-Oriented Programming Skills

Object-Oriented Programming Concepts in Java

Java Object-Oriented Programming Concepts Quiz

Java Classes and Inheritance Quiz

What is the purpose of the `dispContact()` method in the `Person` class?

What is the relationship between the `Person`, `Employee`, and `Customer` classes in the given code?

What is the purpose of the `empID` and `designation` fields in the `Employee` class?

What is the purpose of the `customerID` and `invoiceNo` fields in the `Customer` class?

What is the purpose of the `r` variable in the code snippet?

What is the purpose of the `if` statement in the `MyProg` class?

What is the purpose of the `type()` method in the `Game` class and its subclasses?

What is the relationship between the `Game` class and its subclasses?

What is the purpose of the `Scanner` object in the `MyProg` class?

What is the purpose of the `VehicleInterface` in the given code?

What is the significance of the `implements` keyword in the `CarClass` declaration?

What is the purpose of the line `VehicleInterface CarClass c = new CarClass();` in the `DemoInterface` class?

What is the purpose of the `final` keyword in the declaration `int a = 10;` within the `VehicleInterface`?