Question 1easymulti select
Full question →- A
$value
Valid: starts with $.
- B
my#var
Why wrong: # not allowed.
- C
my-var
Why wrong: Hyphen not allowed.
- D
_myVar
Valid: starts with underscore.
- E
2ndPlace
Why wrong: Cannot start with digit.
Question 328 of 509
Quick Answer
The answer is $value and _myVar. These are both valid Java identifiers because the Java Language Specification (JLS §3.8) allows identifiers to begin with a letter, an underscore (_), or a dollar sign ($), followed by any combination of letters, digits, underscores, or dollar signs. This means that while $value starts with a dollar sign, it is perfectly legal, and _myVar starts with an underscore, which is also explicitly permitted. On the Oracle Java Foundations 1Z0-811 exam, this concept tests your understanding of the strict rules for naming variables, methods, and classes—a common trap is assuming that special characters like $ or _ are forbidden, or that digits can start an identifier. Remember the memory tip: "Start with a letter, dollar, or underscore; digits can follow, but never lead."
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.
Which TWO of the following are valid Java identifiers? (Choose 2)
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
✓
$value
Option A ($value) is correct because Java allows identifiers to begin with a dollar sign ($) or underscore (_), and the rest can include letters, digits, or these special characters. The dollar sign is a valid starting character per the Java Language Specification (JLS §3.8), so $value is a legal identifier.
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.
- ✓
$value
Why this is correct
Valid: starts with $.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
my#var
Why it's wrong here
# not allowed.
- ✗
my-var
Why it's wrong here
Hyphen not allowed.
- ✓
_myVar
Why this is correct
Valid: starts with underscore.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
2ndPlace
Why it's wrong here
Cannot start with digit.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the rule that identifiers cannot start with a digit and cannot contain special characters like # or -, but candidates may mistakenly think hyphens or hash symbols are allowed because they appear in other programming contexts or variable naming conventions.
Detailed technical explanation
How to think about this question
Java identifiers are defined by the JLS §3.8 to start with a Java letter (which includes Unicode letters, underscore, and dollar sign) and continue with Java letters or digits. The dollar sign is often used in generated code (e.g., inner class names like Outer$Inner) but is discouraged in user-written code. The underscore alone (_) is a valid identifier, though it was reserved as a keyword in Java 9+ to avoid confusion.
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: $value — Option A ($value) is correct because Java allows identifiers to begin with a dollar sign ($) or underscore (_), and the rest can include letters, digits, or these special characters. The dollar sign is a valid starting character per the Java Language Specification (JLS §3.8), so $value is a legal identifier.
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
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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