Interfaces and Abstract Classes
practice.

Which of these method can set the out stream to OutputStream?

Which of the following constant are defined in Boolean wrapper?

Which of these type parameters is used for a generic class to return and accept any type of object?

What will be the output of the following Java program?

import java.util.*;
public class genericstack  
{
    Stack  stk = new Stack ();
public void push(E obj)
    {
        stk.push(obj);
}
public E pop()
    {
        E obj = stk.pop();
  return obj;
}
}
class Output
{
    public static void main(String args[])
    {
        genericstack  gs = new genericstack();
        gs.push("Hello");
        System.out.print(gs.pop() + " ");
        genericstack  gs = new genericstack();
        gs.push(36);
        System.out.println(gs.pop());
    }
}

What will be the output of the following Java code?

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

What will be the output of the following Java code?

class isNaN_output 
{
    public static void main(String args[]) 
    {
        Double d = new Double(1 / 0.);  
        boolean x = d.isNaN();
        System.out.print(x);
    }
}

What is the range of numbers returned by Math.random() method?

What will be the output of the following Java program?

    package pkg;
    class display 
    {
        int x;
        void show() 
        {
            if (x > 1)
                System.out.print(x + " ");
        }
    }
    class packages 
    {
        public static void main(String args[]) 
        {
            display[] arr=new display[3];
            for(int i=0;i<3;i++)
                arr[i]=new display();
            arr[0].x = 0;      
            arr[1].x = 1;
            arr[2].x = 2;
            for (int i = 0; i < 3; ++i)
                arr[i].show();
         }
    }

Note : packages.class file is in directory pkg;

What will be the output of the following Java program?

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

Which of these methods loads the specified dynamic library?

What will be the output of the following Java program?

class Output
{
    public static void main(String args[])
    {
        int a = Character.MIN_VALUE;
        System.out.print((char)a);
    }
}

Which of these class can encapsulate an entire executing program?

What will be the output of the following Java program?

import java.lang.System;
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);
     }
}

Which class is used to generate random number?

Which of these class can be used to implement the input stream that uses a character array as the source?

Which of these is a process of converting a simple data type into a class?

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

Which of these method(s) is/are used for writing bytes to an outputstream?

Which of these exceptions will be thrown if we use null reference for an arithmetic operation?

Which of these is a super class of wrappers Long, Character & Integer?