1Z0-811 Java Basics and Syntax Practice Question
Which TWO of the following are valid Java identifiers? (Choose two.)
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
In Java, identifiers must start with a letter, underscore, or dollar sign, and subsequent characters can include digits. Reserved words cannot be used. _myVariable and $value are valid. 2ndPlace starts with a digit, my-var contains a hyphen, and class is a reserved word.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
my-var
Why it's wrong here
Invalid: contains hyphen, which is not allowed.
- ✓
$value
Why this is correct
Valid: starts with dollar sign.
- ✓
_myVariable
Why this is correct
Valid: starts with underscore.
- ✗
2ndPlace
Why it's wrong here
Invalid: starts with a digit.
- ✗
class
Why it's wrong here
Invalid: 'class' is a reserved word.
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