Java Collections Framework MCQs Questions | Java Program MCQs

import java.util.*;
class Bitset
{
    public static void main(String args[])
    {
        BitSet obj = new BitSet(5);
        for (int i = 0; i < 5; ++i)
            obj.set(i);
        System.out.print(obj.get(3));
    }
}

import java.util.*;
class Bitset 
{
    public static void main(String args[]) 
    {
        BitSet obj = new BitSet(5);
        for (int i = 0; i < 5; ++i)
            obj.set(i);
        obj.clear(2);
        System.out.print(obj);
    }
}

import java.util.*;
class Collection_Algos 
{
    public static void main(String args[]) 
    {
        LinkedList list = new LinkedList();
        list.add(new Integer(2));
        list.add(new Integer(8));
        list.add(new Integer(5));
        list.add(new Integer(1));
        Iterator i = list.iterator();
  while(i.hasNext())
      System.out.print(i.next() + " ");
    }
}

import java.util.*;
class Collection_iterators 
{
    public static void main(String args[]) 
    {
        LinkedList list = new LinkedList();
        list.add(new Integer(2));
        list.add(new Integer(8));
        list.add(new Integer(5));
        list.add(new Integer(1));
        Iterator i = list.iterator();
        Collections.reverse(list);
  Collections.sort(list);
        while(i.hasNext())
      System.out.print(i.next() + " ");
    }
}

import java.util.*;
class Output 
{
    public static void main(String args[]) 
    {
        HashSet obj = new HashSet();
        obj.add("A");
        obj.add("B");
        obj.add("C");
        System.out.println(obj + " " + obj.size());
    }
}