Quiz on Polymorphism in Java

If a class is overridden with a reference variable of a parent class then which datamember will  be passed as an argument ?

class Programming {

void Print ( ) {

System.out.println(“There are many programming languages”);

}

};

class Java extends Programming {

void Print ( ) {

System.out.println(“ Java is a programming language”);

}

};

class Main {

public static void main ( String args [ ] ) 

{

Programming p = new Java();

p.Print();

}

}

class One {

void method();{ 

System.out.println(“Method of class A”);

}

};

class Two extends One {

void method(); { 

System.out.println(“Method of class B”);

}

void method2(); {

(System.out.println(“Method of class B”);

}

};

class Main {

public static void main ( String args [ ] )

{

One object = new Two();

object,method();

}

}

Which concept in Java is used to perform Polymorphism ?

class First {

String a = “DataFlair”;

};

class Second extends First {

String a = “Webservices”;

void Display() {

System.out.println(a);

}

};

Class Main {

public static void main ( String args [ ] )

{

First obj = new Second();

obj.Display();

}

}

class Polymorphism {

void Method ( ) {

System.out.println(“This method can be executed “);

}

};

class B extends Polymorphism {

final void Method ( ) {

System.out.println(“This method cannot be executed”);

}

};

class Main {

public static void main ( String args [ ] )

{

Polymorphism p = new B();

B.method();

}

}

 class Main {

public static void main ( String args [ ] )

{

void Print( ) {

System.out.println(“DataFlair”);

}

void Print( Char a) {

System.out.println(a);

}

Main m = new Main();

m.Print();

m.Print(“DataFlair”);

}

}

class Program {

public static void main ( String args [ ] )

{

Void add ( int a , int b)

{

System.out.println(a + b );

}

void add(char a , char b)

{

System.out.println( a + b );

}

Program p = new Program();

p.add(1,2);

p.add(“Data”,”Flair”);

}

}

Method overriding is present in class A and B. Other than it another method is also present in 

   class B. In these methods which cannot be accessed by reference variables of class A ?

Constructor overloading is which type of polymorphism concept ?

class Frameworks {

void Display(“ Frameworks “);

}

};

class AppDevelopment extends Frameworks {

void Display(“ Android studio , Flutter “);

}

};

class WebDevelopment extends Frameworks {

void Display ( “ HTML , CSS “);

}

};

class Main {

public static void main ( String args [ ] )

{

Frameworks f = new Frameworks();

Frameworks f1 = new AppDevelopment();

Frameworks f2 = new WebDevelopment();

f1.Display(“Flutter”);

}

}

class Polymorphism {

void Method1 {

System.out.println(“Private Limited”);

}

};

class Concept extends Polymorphism {

void Method2 {

System.out.println(“Webservices”);

}

void Method3 {

System.out.println(“DataFlair”);

}

};

class Main {

public static void main ( String args [ ] ) {

}

}

What is the concept of referring object of child class with the reference variable of parent 

      class ?

 class Sample {

void Method() {

System.out.println(“Super class Method”);

}

};

class Example extends Sample {

void Method() {

System.out.println(“SubClass Method”);

}

public static void main ( String args [ ] )

{

Sample s = new Example();

s.Method();

}

}

class Organisms {

void foursesnse ( String a , string b , string c , string d )

{

System.out.println(“Bats have four senses”);

}

    void fivesense ( string a , string b , string c , string d , string e )

{

System.out.println(“Elephant has five senses”);

}

void sixsenses ( String a , String b , String c , String d , String e , String f )

{

System.out.println(“Humans has six senses”);

} 

public static void main ( String args [ ] )

{

Organisms obj = new Organisms();

obj.(“Vision” , “touch” , “smell” , “hearing “ , “taste”);

}

}