java iterators: the first tasks

Question

My opinion that the first question in not clear!!
Look at a code:

What is the output of this code?
List<Integer> list = new ArrayList<Integer>();
list.add(10);
list.add(20);
list.add(30);
Iterator<Integer> it = list.iterator();
it.next();
System.out.println(it.next());

!! this is the properly:
What is the output of this code?
ArrayList<Integer> list = new ArrayList<Integer>();
list.add(10);
...........

Answer 1

List<Integer> list = new ArrayList<Integer>();
list.add(10);
list.add(20);
list.add(30);
Iterator<Integer> it = list.iterator();
it.next();
System.out.println(it.next());

//output 20

Answer 2

20

Answer 3

The output is 20

Answer 4

The output of the code is 20.

Answer 5

20

Answer 6

ok, but the code in this sample return error :)

Answer 7

this is the code, but look at the simple in the "?" for "Iterators" section ...

import java.util.Iterator;
import java.util.ArrayList;

public class MyClass {
public static void main(String[ ] args) {
List<Integer> list = new ArrayList<Integer>();
list.add(10);
list.add(20);
list.add(30);
Iterator<Integer> it = list.iterator();
it.next();
System.out.println(it.next());

}
}
}

Answer 8

thank you!

Answer 9

I think it should have an error..According to my knowledge the correct answer is 10.

Answer 10

Yes