1Z0-829 Working with Arrays and Collections Practice Question
Network Topology
Given the above Java version, which of the following is NOT a standard Java 17 feature?
⚠ Common exam trap
Many exam-takers assume pattern matching for switch is a standard feature because it is widely discussed and similar to other finalized features like records or sealed classes, but Oracle deliberately kept it in preview in Java 17 to test further refinements.
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
✓
Pattern matching for switch (preview)
Pattern matching for switch is a preview feature in Java 17, not a standard feature. It was introduced as a preview under JEP 406 and requires the --enable-preview flag to be used. Standard features in Java 17 are finalized and do not require any preview flags.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
All of the above are standard
Why it's wrong here
Incorrect: Pattern matching for switch is preview.
- ✗
Sealed classes
Why it's wrong here
Incorrect: Sealed classes are standard in Java 17.
- ✗
Text blocks
Why it's wrong here
Incorrect: Text blocks are standard since Java 15.
- ✓
Pattern matching for switch (preview)
Why this is correct
Correct: This is a preview feature in Java 17, not standard.
- ✗
Records
Why it's wrong here
Incorrect: Records are a standard feature in Java 17.
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