int index = 1； 
String [] test = new String[3]； 
String foo = test[index]；    
What is the result？（）  

public class Test { 
public static void main （String[]args） { 
String foo = args[1]； 
String bar = args[2]； 
String baz = args[3]； 
System.out.printIn（“baz = ” + baz）； 
} 
} 
And the output： 
Baz = 2 
Which command line invocation will produce the output？（）  

1. package foo； 
2.   
3. import java.util.Vector； 
4.   
5. private class MyVector extends Vector { 
6. int i = 1； 
7. public MyVector（）  { 
8. i = 2； 
9.    } 
10. } 
11.   
12. public class MyNewVector extends MyVector { 
13. public MyNewVector （）  { 
14. i = 4；
 15. } 
16. public static void main （String args []）  { 
17. MyVector v = new MyNewVector（）； 
18.   } 
19. }    
The file MyNewVector.java is shown in the exhibit.  What is the result？（）  

class super { 
public int getLength（）  {return 4；} 
} 
public class Sub extends Super { 
public long getLength（） {return 5；} 
public static void main （String[]args）  { 
super sooper = new Super （）； 
Sub sub = new Sub（）； 
System.out.printIn（ 
sooper.getLength（）+ “，” + sub.getLength（）   }； 
} 
What is the output？（）