Developing Algorithms Using Arrays

AP Computer Science A· difficulty 4/5

int[] a = {1, 2, 3};
int[] b = new int[a.length];
for (int i = 0; i < a.length; i++) b[i] = a[i];
a[0] = 99;
System.out.println(b[0]);

What is printed?

A
$1$
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B
$99$
C
$0$
D
$Compilation error$

Explanation

Because b is a separate array with copied values, modifying a[0] does not affect b[0]. b[0] is still 1.

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