$10.$ In the following code an integer array is passed to a function that attempts to exchange its first two

elements. Do the elements get exchanged? If not, why not?

int$[]$ array$1=\{1,2,3,4,5\}$;

exchangeInts$($array$1)$;

System.out.println$($array$1[0])$;

System.out.println$($array$1[1])$;

$...$

public void exchangeInts$($int$[]$ array$1)$

$\{$

int temp;

temp $=$ array$1[0]$;

array$1[0]=$array$1[1]$;

array$1[1]=$temp;

$\}$

$11.$ In the following code a String array is passed to a function that attempts to exchange its first two

Strings. Do the elements get exchanged? If not, why not?

String$[]$ array$1=\{"$one$",$"two","three","four","five"$\}$;

exchangeStrings$($array$1)$;

System.out.println$($array$1[0])$;

System.out.println$($array$1[1])$;

$...$

public void exchangeStrings$($String$[]$ array$1)$

$\{$

String temp;

temp$=$array$1[0]$;

array$1[0]=$array$1[1]$;

array$1[1]=$temp;

$\}$

$12.$ Recall that a superclass reference variable can be used to point to subclass objects. The following

code needs to have one cast in order to compile. Where should the cast be placed in the code?

String str$1=$"hello";

Object obj$1=$str$1$;

String str$2=$obj$1$;