Question 1easymultiple choice
Full question →- A
null
Why wrong: null is for objects.
- B
true
Why wrong: Default is false.
- C
false
Correct.
- D
0
Why wrong: Not a boolean value.
Question 472 of 509
Quick Answer
The answer is false. In Java, the default value of a boolean variable is false, as defined by the Java Language Specification (JLS §4.12.5), which mandates that all primitive types receive a specific default when declared as instance or static fields. This contrasts with local variables, which the compiler forces you to initialize explicitly before use. On the Oracle Java Foundations 1Z0-811 exam, this concept tests your understanding of how Java handles memory allocation and initialization for class-level variables versus method-scoped ones. A common trap is assuming that boolean defaults to null or true, but since boolean is a primitive, not an object, it can never be null. To remember this, think of the word "false" as the default state of a light switch being off—it’s the safe, uninitialized position that Java assigns automatically.
1Z0-811 Primitives, Strings and Operators Practice Question
This 1Z0-811 practice question tests your understanding of primitives, strings and operators. 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.
What is the default value of a boolean variable 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
✓
false
In Java, the default value of a boolean variable (when declared as a class field or instance variable) is 'false'. This is specified by the Java Language Specification (JLS §4.12.5), which defines default values for all primitive types. Unlike local variables, which must be explicitly initialized, instance and static variables receive default values automatically.
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.
- ✗
null
Why it's wrong here
null is for objects.
- ✗
true
Why it's wrong here
Default is false.
- ✓
false
Why this is correct
Correct.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
0
Why it's wrong here
Not a boolean value.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the distinction between default values for primitives vs. objects, and the trap here is that candidates confuse boolean's default with the default for Boolean (which is null) or mistakenly think boolean defaults to true or a numeric value.
Detailed technical explanation
How to think about this question
Under the hood, the JVM initializes boolean fields to false by setting the underlying byte to 0 (where 0 represents false and 1 represents true). This matters in multi-threaded environments where uninitialized boolean fields could cause subtle race conditions if not properly synchronized. In real-world code, relying on default values for boolean flags in classes can lead to logic errors if the default is not the intended starting state.
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?
Primitives, Strings and Operators — This question tests Primitives, Strings and Operators — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: false — In Java, the default value of a boolean variable (when declared as a class field or instance variable) is 'false'. This is specified by the Java Language Specification (JLS §4.12.5), which defines default values for all primitive types. Unlike local variables, which must be explicitly initialized, instance and static variables receive default values automatically.
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
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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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