Question 1easymulti select
Full question →- A
2ndValue
Why wrong: Cannot start with digit.
- B
my_value
Valid underscore in name.
- C
$dollar
Valid dollar sign start.
- D
my-var
Why wrong: Hyphen is not allowed.
- E
_myVar
Valid underscore start.
Question 290 of 509
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 are valid Java identifiers?
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
✓
my_value
Option B (my_value) is a valid Java identifier because it starts with a letter (m) and contains only letters, digits, and underscores. Java identifiers must begin with a letter, underscore, or dollar sign, and subsequent characters can include letters, digits, underscores, or dollar signs.
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.
- ✗
2ndValue
Why it's wrong here
Cannot start with digit.
- ✓
my_value
Why this is correct
Valid underscore in name.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
$dollar
Why this is correct
Valid dollar sign start.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
my-var
Why it's wrong here
Hyphen is not allowed.
- ✓
_myVar
Why this is correct
Valid underscore start.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the rule that identifiers cannot start with a digit and cannot contain hyphens, tricking candidates who might think underscores or dollar signs are invalid or that hyphens are acceptable.
Detailed technical explanation
How to think about this question
Java identifiers are case-sensitive and have no length limit, but they must not be Java reserved keywords (e.g., 'class', 'int'). The underscore and dollar sign are allowed, though the dollar sign is conventionally used for generated code or inner class references. In practice, using underscores in identifiers is common for constants (e.g., MAX_VALUE) but discouraged for variable names in modern Java style guides.
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.
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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: my_value — Option B (my_value) is a valid Java identifier because it starts with a letter (m) and contains only letters, digits, and underscores. Java identifiers must begin with a letter, underscore, or dollar sign, and subsequent characters can include letters, digits, underscores, or dollar signs.
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 →
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Last reviewed: Jun 25, 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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