The correct answer includes that array indices start at 0, and this is true because in Java, arrays are objects that are dynamically created and inherit from java.lang.Object, meaning they behave as reference types with a public length field rather than a length method. This distinction is critical for the Oracle Java Foundations 1Z0-811 exam, which frequently tests your understanding of arrays as objects by presenting traps such as confusing length with a method call or assuming arrays are primitives. A common trick on the exam is to ask which statements about arrays are correct, where you must recall that arrays can be assigned to an Object variable, cloned via clone(), and that their indices always begin at zero. To remember this, think of the mnemonic "Zero is the hero" — array indices start at zero because the first element is at offset zero from the base memory address, reinforcing that arrays are objects with a fixed-length field, not a method.
1Z0-811 Arrays and Methods Practice Question
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.
Which three statements about arrays are correct? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Arrays are objects in Java.
Option B is correct because in Java, arrays are objects that are dynamically created and can be assigned to variables of type Object, cloned via the clone() method, and have a length field (not a method). They inherit from java.lang.Object and are treated as reference types, even when they store primitive values.
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.
✗
The size of an array can change after creation.
Why it's wrong here
Arrays have a fixed length; cannot be resized.
✓
Arrays are objects in Java.
Why this is correct
Arrays inherit from Object and have methods like clone().
Related concept
Read the scenario before looking for a memorised answer.
✗
The length of an array must be specified at compile time with a constant expression.
Why it's wrong here
Length can be specified with a variable (e.g., new int[n]), determined at runtime.
✓
Arrays can store both primitive and object types.
Why this is correct
For example, int[] stores primitives, String[] stores objects.
Related concept
Read the scenario before looking for a memorised answer.
✓
Array indices start at 0.
Why this is correct
Standard Java array indexing.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the compile-time constant requirement for array lengths with the fact that the length can be a runtime expression, leading them to incorrectly select option C as correct.
Detailed technical explanation
How to think about this question
Under the hood, a Java array is a contiguous block of memory on the heap, with a header that stores the length as an int field. The JVM checks array bounds at runtime, throwing ArrayIndexOutOfBoundsException if an invalid index is accessed. In real-world scenarios, arrays are often used for performance-critical code where fixed-size data structures are acceptable, such as in image processing buffers or network packet parsing.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Arrays and Methods — This question tests Arrays and Methods — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Arrays are objects in Java. — Option B is correct because in Java, arrays are objects that are dynamically created and can be assigned to variables of type Object, cloned via the clone() method, and have a length field (not a method). They inherit from java.lang.Object and are treated as reference types, even when they store primitive values.
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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Question Discussion
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