1Z0-811 Java Basics and Syntax Practice Question
Which TWO are valid identifiers in Java? (Choose two.)
⚠ Common exam trap
Oracle often tests the rule that identifiers cannot start with a digit and cannot contain hyphens, while tricking candidates into thinking underscores and dollar signs are invalid or that hyphens are allowed as separators.
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
✓
$money
In Java, identifiers can begin with a letter, an underscore (_), or a dollar sign ($). The dollar sign is a valid starting character, so '$money' is a legal identifier. This is specified in the Java Language Specification (JLS §3.8).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
$money
Why this is correct
$ is allowed.
- ✗
123abc
Why it's wrong here
Starts with digit.
- ✓
_value
Why this is correct
_ is allowed.
- ✗
2ndPlace
Why it's wrong here
Cannot start with digit.
- ✗
my-var
Why it's wrong here
Hyphen not allowed.
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