Given the code fragment:

Which modification enables the code to print 54321?

Given the definitions of the Birdclass and the Peacock class:

and the code fragment:

Which code snippet can be inserted to print Fly.Dance. ?

Given:
public class Test1 {
static void doubling (Integer ref, int pv) {
ref =20;
pv = 20;
}
public static void main(String[] args) {
Integer iObj = new Integer(10);
int iVar = 10;
doubling(iObj++, iVar++);
System.out.println(iObj+ ", "+iVar);
What is the result?

Given the following array:

Which two code fragments, independently, print each element in this array? (Choose two.)

Given:

What is the result?