Interfaces and Abstract Classes
practice.

Which of these class is used to read and write bytes in a file?

Which of these method returns the remainder of dividend / divisor?

Which of the following is the correct way of implementing an interface salary by class manager?

Which of these is a mechanism for naming and visibility control of a class and its content?

Which of these methods returns the class of an object?

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, 3, a.length - 3);
        System.out.print(new String(a) + " " + new String(b));
    }
}

What will be the output of the following Java program?

class Output 
{
    public static void main(String args[]) 
    {
        double x = 3.14;  
        int y = (int) Math.toRadians(x);
        System.out.print(y);
    }
}

Which of this package is used for analyzing code during run-time?

Which of these class defines how the classes are loaded?

Which of these class is a superclass of all other classes?

What will be the output of the following Java program?

import java.util.*;
class LOCALE_CLASS
{
    public static void main(String args[])
    {
        Locale obj = new Locale("HINDI") ;
        System.out.print(obj.getDisplayLanguage());
    }
}

What will be the output of the following Java program?

class Output
{
    public static void main(String args[])
    {
  char a = '@';
        boolean x = Character.isLetter(a);
        System.out.print(x);
    }
}

What will be the output of the following Java code?

class Output 
{
     public static void main(String args[]) 
     {
         double x = 3.14;  
         int y = (int) Math.floor(x);
         System.out.print(y);
     }
}

What will be the output of the following Java program?

import java.util.*;
class LOCALE_CLASS
{
    public static void main(String args[])
    {
        Locale obj = new Locale("HINDI", "INDIA") ;
        System.out.print(obj.getDisplayLanguage());
    }
}

What will be the output of the following Java code?

class Output 
{
    public static void main(String args[]) 
    {
        long start, end;   
        start = System.currentTimeMillis();
        for (int i = 0; i < 10000000; i++);
        end = System.currentTimeMillis();
        System.out.print(end - start);
    }
}

All methods must be implemented of an interface.

What will be the output of the following Java code?

class Output 
{
    public static void main(String args[])
    {
        Double i = new Double(257.5);  
        Double x = i.MAX_VALUE;
        System.out.print(x);
    }
}

Which of these exceptions is thrown by methods of System class?

Which of these class encapsulate the runtime state of an object or an interface?

Which of these methods is used to notify observer the change in observed object?