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 are primitive data types in Java? (Choose three.)
double
Correct: double is a primitive type.
Integer
Why wrong: Integer is a wrapper class, not primitive.
boolean
Correct: boolean is a primitive type.
int
Correct: int is a primitive type.
String
Why wrong: String is a class, not primitive.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
double
Option A is correct because `double` is one of the eight primitive data types in Java, used to represent double-precision 64-bit IEEE 754 floating-point numbers. Primitives are predefined by the language and stored directly in stack memory, not as objects.
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.
double
Why this is correct
Correct: double is a primitive type.
Related concept
Read the scenario before looking for a memorised answer.
Integer
Why it's wrong here
Integer is a wrapper class, not primitive.
boolean
Why this is correct
Correct: boolean is a primitive type.
Related concept
Read the scenario before looking for a memorised answer.
int
Why this is correct
Correct: int is a primitive type.
Related concept
Read the scenario before looking for a memorised answer.
String
Why it's wrong here
String is a class, not primitive.
Common exam traps
Oracle often tests the distinction between primitive types and their corresponding wrapper classes, as candidates frequently mistake `Integer` or `String` for primitives because they are commonly used and have similar names.
Detailed technical explanation
Java has exactly eight primitive types: `byte`, `short`, `int`, `long`, `float`, `double`, `char`, and `boolean`. Primitives are not objects and do not have methods; they are stored on the stack for efficiency. In contrast, wrapper classes like `Integer` and `Boolean` are used when objects are required, such as in collections (e.g., `ArrayList<Integer>`), and involve autoboxing/unboxing conversions.
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Java Basics and Syntax — study guide chapter
Learn the concepts, then practise the questions
Java Basics and Syntax practice questions
Targeted practice on this topic area only
All 1Z0-811 questions
509 questions across all exam domains
Oracle Java Foundations 1Z0-811 study guide
Full concept coverage aligned to exam objectives
1Z0-811 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise 1Z0-811 questions linked to What is Java.
Practise 1Z0-811 questions linked to Java Basics and Syntax.
Practise 1Z0-811 questions linked to Primitives, Strings and Operators.
Practise 1Z0-811 questions linked to Control Flow and Loops.
Practise 1Z0-811 questions linked to Arrays and Methods.
Practise 1Z0-811 questions linked to Object-Oriented Programming.
Practise 1Z0-811 questions linked to Exception Handling and Development Tools.
Practise 1Z0-811 questions linked to 1Z0-811 fundamentals.
Practise 1Z0-811 questions linked to 1Z0-811 scenario.
Practise 1Z0-811 questions linked to 1Z0-811 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Java Basics and Syntax — This question tests Java Basics and Syntax — Read the scenario before looking for a memorised answer..
The correct answer is: double — Option A is correct because `double` is one of the eight primitive data types in Java, used to represent double-precision 64-bit IEEE 754 floating-point numbers. Primitives are predefined by the language and stored directly in stack memory, not as objects.
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.
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 →
Keep practising
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.
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.