Interfaces and Abstract Classes
practice.

Which of these is a super class of Character wrapper?

Which of this package is used for invoking a method remotely?

Which of these packages contain all the Java's built in exceptions?

What will be the output of the following Java code?

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 of these class is used to create user defined exception?

Which of these methods returns the total number of bytes of memory available to the program?

What does System.getProperty("variable") return?

Which of these package provides the ability to read and write in Zip format?

Which of these is a wrapper for simple data type char?

Which of function return absolute value of a variable?

Which of these is a wrapper for simple data type float?

What will be the output of the following Java code?

class Output
{
    public static void main(String args[])
    {
        Double i = new Double(257.578);  
        int x = i.intValue();
        System.out.print(x);
    }
}

What will be the output of the following Java code?

class A 
{
     int x;
     int y;
     void display() 
     {
          System.out.print(x + " " + y);
     }
}
class Output 
{
     public static void main(String args[]) 
     {
         A obj1 = new A();
         A obj2 = new A();
         obj1.x = 1;
         obj1.y = 2;
         obj2 = obj1.clone();
         obj1.display();
         obj2.display();
     }
}

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.abs(x);
         System.out.print(y);
     }
}

Which of these methods of Byte wrapper can be used to obtain Byte object from a string?

What will be the output of the following Java program?

class newthread implements Runnable 
{
Thread t;
    newthread() 
    {
        t = new Thread(this,"New Thread");
        t.start();
}
public void run()
    {
        t.setPriority(Thread.MAX_PRIORITY);	
        System.out.println(t);
}
}
class multithreaded_programing 
{
    public static void main(String args[]) 
    {
        new newthread();        
    }
}

Which of these method returns a smallest whole number greater than or equal to variable 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.ceil(x);
         System.out.print(y);
     }
}

Which of this package is used for handling security related issues in a program?

What will be the output of the following Java program?

class Output 
{
    public static void main(String args[]) 
    {
        Long i = new Long(256);  
        System.out.print(i.hashCode());
    }
}