1Z0-808 Question #98: Real Exam Question with Answer & Explanation

Given:

public class Test2 {
 public static void doChange(int[] arr) {
 for (int pos = 0; pos < arr.length; pos++){
 arr[pos] = arr[pos] + 1;
 }
 }
 public static void main(String[] args) {
 int[] arr = {10, 20, 30};
 doChange(arr);
 for (int x : arr) {
 System.out.print(x + ", ");
 }
 
 doChange(arr[0], arr[1], arr[2]);
 System.out.print(arr[0] + ", " + arr[1] + ", " + arr[2]);
 }
}

What is the result?