Interfaces and Abstract Classes
practice.

Which of these methods of Boolean wrapper returns boolean equivalent of an object.

Which of the following is true about Java system properties?

Which of these can be used to fully abstract a class from its implementation?

Which of the following methods return the value as a double?

What will be the output of the following Java program?

import java.lang.reflect.*;
class Additional_packages
{	 
     public static void main(String args[]) 
     {
   try
         {
       Class c = Class.forName("java.awt.Dimension");
 Field fields[] = c.getFields();
 for (int i = 0; i < fields.length; i++)
     System.out.println(fields[i]);
   }
   catch (Exception e)
         {
               System.out.print("Exception");
         }
    }
}

What is the use of Observable class?

Which of these access specifiers can be used for a class so that its members can be accessed by a different class in the different package?

Which of the following methods Byte wrapper return the value as a double?

Which of these class contains all the methods present in Math class?

Which method is used to generate boolean random values in java?

What is the length of the application box made in the following Java program?

import java.awt.*;
import java.applet.*;
public class myapplet extends Applet
{
    Graphic g;
    g.drawString("A Simple Applet",20,20);    
}

What will be the output of the following Java program?

import java.io.*;
public class filesinputoutput 
{
  public static void main(String[] args) 
    {
 String obj  = "abc";
       byte b[] = obj.getBytes();
       ByteArrayInputStream obj1 = new ByteArrayInputStream(b);
       for (int i = 0; i < 2; ++ i) 
       {
           int c;
           while ((c = obj1.read()) != -1) 
           {
             if(i == 0) 
               {
                 System.out.print((char)c); 
             }
           }
       }
    }
}

What is the value of double consonant 'E' defined in Math class?

Which of the following method of Process class can terminate a process?

Which of these class is not related to input and output stream in terms of functioning?

Which of these class have only one field 'TYPE'?

What happens when we access the same variable defined in two interfaces implemented by the same class?

Which of these exceptions will be thrown if we declare an array with negative size?

What is the Java 8 update of PermGen?

What will be the output of the following Java program?

import java.io.*;
class Chararrayinput 
{
    public static void main(String[] args) 
    {
  String obj  = "abcdefgh";
        int length = obj.length();
        char c[] = new char[length];
        obj.getChars(0, length, c, 0);
        CharArrayReader input1 = new CharArrayReader(c);
        CharArrayReader input2 = new CharArrayReader(c, 1, 4);
        int i;
        int j;
        try 
        {
while ((i = input1.read()) == (j = input2.read())) 
            {
                System.out.print((char)i);
            }
        } 
        catch (IOException e) 
        {
      // TODO Auto-generated catch block
            e.printStackTrace();
  }
}
}