Question 1hardmulti select
Full question →- A
String
Why wrong: Class type.
- B
double
Primitive type.
- C
int
Primitive type.
- D
array
Why wrong: Reference type.
- E
boolean
Primitive type.
Question 386 of 509
Quick Answer
The answer is `boolean`, along with `double`, as both are among Java’s eight primitive data types. These types, including `byte`, `short`, `int`, `long`, `float`, `char`, and `boolean`, store simple values directly in memory rather than as object references, making them the foundation of all Java programs. On the Oracle Java Foundations 1Z0-811 exam, you will be asked to identify which types are primitives versus reference types like `String` or arrays—a common trap is confusing `String` or `Integer` (a wrapper class) with a primitive. Remember that primitives always start with a lowercase letter, while reference types like `String` are capitalized. A helpful memory tip is the mnemonic “**B**e **S**ure **I** **L**ove **F**loats **D**ouble **C**hocolate **B**ars” to recall `boolean`, `short`, `int`, `long`, `float`, `double`, `char`, and `byte`. Mastering these eight types is essential because every Java expression and operation ultimately relies on them.
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 THREE of the following are primitive data types in Java?
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
✓
double
Option B is correct because `double` is one of the eight primitive data types in Java, used to store floating-point numbers with double precision (64-bit IEEE 754). It is a fundamental type that holds a numeric value directly, not an object reference.
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.
- ✗
String
Why it's wrong here
Class type.
- ✓
double
Why this is correct
Primitive type.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
int
Why this is correct
Primitive type.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
array
Why it's wrong here
Reference type.
- ✓
boolean
Why this is correct
Primitive type.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the distinction between primitive types and reference types, trapping candidates who mistakenly think `String` or `array` are primitives because they are commonly used and have literal syntax (e.g., `"hello"` or `{1,2,3}`).
Detailed technical explanation
How to think about this question
Java's eight primitive types are `byte`, `short`, `int`, `long`, `float`, `double`, `char`, and `boolean`. Unlike reference types, primitives are stored directly on the stack (for local variables) and have fixed sizes (e.g., `int` is 32-bit, `double` is 64-bit). A common subtlety is that `char` is unsigned (0 to 65535) and can be used in arithmetic, while `boolean` has no defined size in the JVM specification and is often implemented as an `int`.
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
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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: double — Option B is correct because `double` is one of the eight primitive data types in Java, used to store floating-point numbers with double precision (64-bit IEEE 754). It is a fundamental type that holds a numeric value directly, not an object reference.
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.
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 →
Same concept, more angles
2 more ways this is tested on 1Z0-811
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which THREE of the following are primitive data types in Java?
hard- A.void
- ✓ B.boolean
- ✓ C.int
- D.String
- ✓ E.char
Why B: Option B (boolean) is correct because boolean is one of the eight primitive data types in Java, representing a single bit of information with only two possible values: true or false. It is not an object and does not have methods, unlike reference types such as Boolean (the wrapper class).
Variation 2. Which primitive data type should be used to store a single character?
easy- A.int
- B.byte
- ✓ C.char
- D.String
Why C: Option C is correct because the `char` primitive data type in Java is specifically designed to store a single 16-bit Unicode character, ranging from '\u0000' (0) to '\uffff' (65,535). It can represent any character in the Unicode standard, including letters, digits, and symbols, making it the appropriate choice for a single character value.
Keep practising
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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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