Java Developer

What is the output of the following Java code:

class A{
private double num = 100;
private int square(int a){
return a*a;
}
}
public class Begin{
public static void main(String []aa){
A obj = new A();
System.out.println(obj.num);
System.out.println(obj.square(10));
}
}

In Java, what is the output of the following code:

class A
{
public void inA()
{
System.out.println(“Class A”);
}
}

class B extends A
{
void inA()
{
System.out.println(“Class B”);
}

}

public class Examp2 {
public static void main(String []aa)
{
B b=new B();
b.inA();
}
}

In Java, what is the output of the following code:

package Practi;

public class Examp8 {
protected int a=10;
public int b=9;
int c=100;

Examp8(int a, int b)
{
this.a=a;
this.b=b;
c=1;
}
protected void add()
{
System.out.println(a+b+c);
}

}
package Doprctice;
import Practi.Examp8;
public class Examp8con extends Examp8 {

public Examp8con(int a,int b){
super(a,b);
}
public static void main(String []aa)
{
Examp8con e=new Examp8con(15,10);
e.add();
}
}