Calling a Void Method with Parameters

AP Computer Science A· difficulty 3/5

public class Helper {
    public static void fill(int[] a) {
        a[0] = 99;
    }
}
// ...
int[] arr = {1, 2, 3};
Helper.fill(arr);
System.out.println(arr[0]);

What is printed?

A
$99$
check_circle
B
$1$
C
$0$
D
$Compile-time error$

Explanation

Arrays are reference types; the method modifies the same array object, so arr[0] becomes 99.

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