Question 390 of 481
1Z0-811 Arrays and Methods Practice Question
Exhibit
Refer to the exhibit.
public class ArrayExample {
public static void main(String[] args) {
int[] numbers = {1, 2, 3, 4, 5};
modifyArray(numbers);
System.out.println(numbers[0]);
}
public static void modifyArray(int[] arr) {
arr[0] = 99;
}
}What is the output?
⚠ Common exam trap
A common mistake is assuming array indices start at 1, leading candidates to believe index 5 is out of bounds for a 6-element array. However, Java arrays are zero-indexed, so indices 0-5 are valid, making index 5 the last valid index.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
99
The code initializes an array of size 6 and assigns the value 99 to index 5. Since Java arrays are zero-indexed, index 5 is the last valid index for a 6-element array. The assignment succeeds, and the print statement outputs 99. Option C is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1
Why it's wrong here
1 is the original value, but it is changed to 99.
- ✗
Compilation error
Why it's wrong here
The code compiles and runs without error.
- ✓
99
Why this is correct
The method sets numbers[0] to 99, so that is printed.
- ✗
Runtime exception
Why it's wrong here
No exception occurs; the array is accessed correctly.
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Last reviewed: Jun 30, 2026
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