Question 341 of 481
1Z0-811 Arrays and Methods Practice Question
A method is declared as 'public void printElements(int... numbers)'. Which invocation will cause a compilation error?
⚠ Common exam trap
The trap here is that candidates mistakenly think an array initializer like `{1,2,3}` can be used anywhere an array is expected, but in Java it is only valid in declarations or with `new` — not as a standalone method argument.
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
✓
printElements({1,2,3});
The syntax `{1,2,3}` is an array initializer that can only be used in a variable declaration or as part of an array creation expression (e.g., `new int[]{1,2,3}`). It cannot be passed directly as an argument to a varargs method. The varargs parameter `int... numbers` expects either a sequence of `int` values or an `int[]` array reference, but not an anonymous array initializer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
printElements({1,2,3});
Why this is correct
The provided invocation `printElements({1,2,3});` will cause a compilation error. Array initializer syntax, such as `{1,2,3}`, is exclusively permitted during the declaration of an array (e.g., `int[] arr = {1,2,3};`). It cannot be used directly as a standalone expression or as an argument within a method call. Although the `int... numbers` varargs parameter internally accepts an `int[]`, the compiler requires either individual `int` values or an already instantiated `int[]` object. The given syntax is not a valid way to create an anonymous array for method arguments.
- ✗
printElements(1, 2, 3);
Why it's wrong here
Valid varargs invocation with multiple ints.
- ✗
printElements();
Why it's wrong here
Valid varargs invocation with zero arguments.
- ✗
printElements(new int[]{1,2,3});
Why it's wrong here
Valid varargs invocation with an array.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 25, 2026
This 1Z0-811 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-811 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.