Q. What will be the output of the following code –

import java.util.Map;
import java.util.TreeMap;

public class TreeMapTest {

public static void main (String args[])
{
Map<Integer,String> m= new TreeMap<Integer,String>();
m.put(11, “audi”);
m.put(null, null);
m.put(11,”bmw”);
m.put(null,”fer”);

System.out.println(m.size());
System.out.println(m);
}
}