Interfaces and Abstract Classes
practice.

What will be the output of the following Java program?

package pkg;
class output 
{
    public static void main(String args[])
    { 
        StringBuffer s1 = new StringBuffer("Hello");
        s1.setCharAt(1, x);
        System.out.println(s1);
    }
}

Which of these exceptions handles the situations when an illegal argument is used to invoke a method?

What will be the output of the following Java program?

class Output 
{
     public static void main(String args[]) 
    {
        double x = 2.0;  
        double y = 3.0;
        double z = Math.pow( x, y );
        System.out.print(z);
    }
}

Which of the following constant are defined in Character wrapper?

What will happen if we provide concrete implementation of method in interface?

Which of these class provides various types of rounding functions?

What will be the output of the following Java program?

import java.lang.System;
class Output 
{
    public static void main(String args[])
    {
        byte a[] = { 65, 66, 67, 68, 69, 70 };
        byte b[] = { 71, 72, 73, 74, 75, 76 };  
        System.arraycopy(a, 0, b, 0, a.length);
        System.out.print(new String(a) + " " + new String(b));
    }
}

Which environment variable is used to set java path?

Which system property stores installation directory of JRE?

Which of these coding techniques is used by method isDefined()?

What will be the output of the following Java program?

class Output 
{
     public static void main(String args[]) 
    {
        double x = 3.1;  
        double y = 4.5;
        double z = Math.max( x, y );
        System.out.print(z);
    }
}

What will be the output of the following Java code?

class Output
{
    public static void main(String args[])
    {
  Double i = new Double(257.578123456789);  
        float x = i.floatValue();
        System.out.print(x);
    }
}

What is the return type of Math.random() method?

What is the value of "d" in the following Java code snippet?

double d = Math.round ( 2.5 + Math.random() );

Which of these is an correct way of defining generic class?

Which of the following is the correct way of implementing an interface A by class B?

Where is String Pool stored?

What will be the output of the following Java program?

class exception_handling 
{
        static void throwexception() throws ArithmeticException 
        {        
            System.out.print("0");
            throw new ArithmeticException ("Exception");
        }
        public static void main(String args[]) 
        {
        try 
        {
            throwexception();
        }
        catch (ArithmeticException e) 
        {
                System.out.println("A");
        }
    }
}

Which of these keywords is used by a class to use an interface defined previously?

Classes and Methods are stored in which space?