- A
int arr = {1,2,3};
Why wrong: Invalid. Cannot assign array to int variable.
- B
int arr[];
Why wrong: Invalid as initialization. This is only a declaration.
- C
int[] arr = new int[]{1,2,3};
Valid. Array initializer syntax.
- D
int[] arr = new int[3];
Valid. Creates array with default zeros.
- E
int[3] arr;
Why wrong: Invalid syntax. Array size not allowed in declaration.
Question 204 of 509
1Z0-811 Java Basics and Syntax Practice Question
This 1Z0-811 practice question tests your understanding of java basics and syntax. 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.
Which TWO of the following are legal ways to declare and initialize an array?
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
✓
int[] arr = new int[]{1,2,3};
Option C is correct because it uses the valid syntax `int[] arr = new int[]{1,2,3};` which declares an array variable of type `int[]`, creates a new array object with an initializer list, and assigns it to the variable. This is a legal way to both declare and initialize an array in a single statement, as the array size is inferred from the number of elements in the initializer.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
int arr = {1,2,3};
Why it's wrong here
Invalid. Cannot assign array to int variable.
- ✗
int arr[];
Why it's wrong here
Invalid as initialization. This is only a declaration.
- ✓
int[] arr = new int[]{1,2,3};
Why this is correct
Valid. Array initializer syntax.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
int[] arr = new int[3];
Why this is correct
Valid. Creates array with default zeros.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
int[3] arr;
Why it's wrong here
Invalid syntax. Array size not allowed in declaration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the distinction between declaration and initialization, and the trap here is that candidates may think `int arr[];` (Option B) is sufficient because it declares an array, but the question explicitly requires both declaration and initialization, making it incomplete.
Detailed technical explanation
How to think about this question
In Java, array declarations can place the brackets after the type (`int[] arr`) or after the variable name (`int arr[]`), but the latter is less common and can be confusing. The `new int[]{1,2,3}` syntax is an anonymous array creation expression that does not require a size because it is inferred from the initializer; this is useful when passing an array directly to a method without storing it in a variable. Under the hood, the JVM allocates contiguous memory for the array object on the heap, and the reference variable holds the address of that object.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 1Z0-811 question test?
Java Basics and Syntax — This question tests Java Basics and Syntax — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: int[] arr = new int[]{1,2,3}; — Option C is correct because it uses the valid syntax `int[] arr = new int[]{1,2,3};` which declares an array variable of type `int[]`, creates a new array object with an initializer list, and assigns it to the variable. This is a legal way to both declare and initialize an array in a single statement, as the array size is inferred from the number of elements in the initializer.
What should I do if I get this 1Z0-811 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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