Quick Answer
The answer is 0. In Java, when you declare an array of a primitive type like `int` using the `new` keyword, the JVM automatically initializes every element to that type's default value, which for `int` is `0`. This happens because the array is allocated on the heap, and memory is zeroed out before any explicit assignment. On the Oracle Java Foundations 1Z0-811 exam, this concept tests your understanding of default int array values and how Java handles initialization for primitive arrays versus local variables—a common trap is confusing uninitialized local variables (which cause a compile error) with array elements, which always get defaults. Remember that all numeric primitives default to `0`, booleans to `false`, and chars to `'\u0000'`. A simple memory tip: think of a fresh parking lot—every spot (element) is empty (zero) until you park a car (assign a value).
This 1Z0-811 practice question tests your understanding of arrays and methods. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Given the array declaration: int[] data = new int[5];, what is the value of data[2] after initialization?
2
Why wrong: Index 2 is the third element, but no assignment has been made.
0
Default value for int array elements.
false
Why wrong: false is default for boolean, not int.
null
Why wrong: null is default for object references, not primitives.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
0
In Java, when an array of primitive type `int` is created using `new int[5]`, all elements are automatically initialized to the default value for `int`, which is `0`. Therefore, `data[2]` (the third element) holds the value `0` after initialization.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
2
Why it's wrong here
Index 2 is the third element, but no assignment has been made.
0
Why this is correct
Default value for int array elements.
Related concept
Read the scenario before looking for a memorised answer.
false
Why it's wrong here
false is default for boolean, not int.
null
Why it's wrong here
null is default for object references, not primitives.
Common exam traps
Oracle often tests the distinction between default values for primitives (e.g., `0` for `int`) versus objects (`null`) and the misconception that array elements are initialized to their index number or left uninitialized.
Detailed technical explanation
Under the hood, the JVM allocates a contiguous block of memory for the array and writes the default value (`0` for `int`) into each slot during initialization. This default initialization is guaranteed by the Java Language Specification (JLS §4.12.5), ensuring that local variables are not left uninitialized. In real-world scenarios, relying on default values can prevent null pointer exceptions when working with object arrays, but for primitives it avoids undefined behavior seen in languages like C.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 1Z0-811 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Arrays and Methods — This question tests Arrays and Methods — Read the scenario before looking for a memorised answer..
The correct answer is: 0 — In Java, when an array of primitive type `int` is created using `new int[5]`, all elements are automatically initialized to the default value for `int`, which is `0`. Therefore, `data[2]` (the third element) holds the value `0` after initialization.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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.
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