Inheritance and Polymorphism in Object-Oriented Programming

What does inheritance create in object-oriented programming?

A 'uses a' relationship among classes

A 'has a' relationship among classes

A 'is a' relationship among classes (correct)

A 'belongs to' relationship among classes

What kind of characteristics does a specialized object have in relation to the general object?

Subset of the characteristics of the general object

Opposite characteristics

Similar characteristics

All of the characteristics of the general object, plus additional special characteristics (correct)

Which term best describes the relationship between a post graduate student and a student?

Generalization

Specialization (correct)

Aggregation

Encapsulation

What term describes the relationship between an employee and a person?

'Is a' relationship Signup and view all the answers

Which relationship can be extended through inheritance in object-oriented programming?

'Is a' relationship Signup and view all the answers

What is the purpose of inheritance in object-oriented programming?

To create reusable classes with shared characteristics Signup and view all the answers

What is the term used for the relationship between a superclass and a subclass?

Parent-child relationship Signup and view all the answers

Which keyword is used in Java to define a subclass?

extends Signup and view all the answers

What happens to private members of the superclass in a subclass?

They are not inherited by the subclass Signup and view all the answers

Which keyword refers to an object's superclass in Java?

super Signup and view all the answers

When a subclass is instantiated, which constructor is executed first?

Superclass default constructor Signup and view all the answers

What must be the first Java statement in a subclass constructor when calling a superclass constructor?

<code>super</code> keyword Signup and view all the answers

What is it called when a subclass method has the same signature as a superclass method?

<code>Method overriding</code> Signup and view all the answers

Which annotation should be used before a subclass method declaration to indicate method overriding?

@Override Signup and view all the answers

In a Salaried Employee class, how can the get_salary() method be modified to override the superclass method?

<code>public double get_salary() { return salary + bonus - deductions ; }</code> Signup and view all the answers

What happens to constructors when a subclass is instantiated?

<code>Superclass default constructor is executed first</code> Signup and view all the answers