1Z0-829 Controlling Program Flow Practice Question
Which THREE statements about the switch statement in Java are correct?
⚠ Common exam trap
Many exam-takers assume the default case must be last, or that break is always required, or that any final variable can be used as a case label, when in fact only compile-time constant expressions are allowed.
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
✓
The default case can be placed anywhere within the switch block.
The default case can be placed anywhere within the switch block according to the Java Language Specification. Option D is correct: case labels must be compile-time constant expressions; a final variable assigned a constant expression qualifies as a compile-time constant. Option E is correct: switch works with int, char, String, and enum types. Option B is incorrect because case values must be compile-time constants, not arbitrary runtime expressions. Option C is incorrect because break is not mandatory; it is optional and used to prevent fall-through.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The default case can be placed anywhere within the switch block.
Why this is correct
Correct. The default case can appear anywhere in the switch block.
- ✗
Case values can be runtime expressions.
Why it's wrong here
Incorrect. Case values must be compile-time constant expressions.
- ✗
A break statement is mandatory after each case block.
Why it's wrong here
Incorrect. break is optional; without it, execution falls through to the next case.
- ✓
Case labels can be variables if they are final and assigned a constant expression.
Why this is correct
Correct. A final variable initialized with a constant expression is a compile-time constant.
- ✓
The switch statement can be used with int, char, String, and enum types.
Why this is correct
Correct. switch supports int, char, String, and enum types.
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