Developing Algorithms Using Arrays

AP Computer Science A· difficulty 4/5

public static void modify(int[] arr) {
  arr[0] = 100;
}
public static void main(String[] args) {
  int[] a = {1, 2, 3};
  modify(a);
  System.out.println(a[0]);
}

What is printed?

A
$100$
check_circle
B
$Compilation error$
C
$0$
D
$1$

Explanation

Array references are passed by value, but the value is a reference to the same array. The method modifies the underlying array, so a[0] is now 100.

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