1Z0-829 Java Platform Overview and Packaging Practice Question
Network Topology
Given the output of `java --list-modules` from a Java 17 installation, which module is NOT included by default when using the `--release 17` flag with `javac`?
⚠ Common exam trap
Oracle often tests the distinction between standard modules (always included with `--release`) and incubator/preview modules (explicitly opt-in), causing candidates to assume all listed modules are part of the default API.
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
✓
jdk.incubator.foreign
The `--release 17` flag restricts `javac` to the standard Java SE 17 API, which does not include incubator modules like `jdk.incubator.foreign`. Incubator modules are preview features that are not part of the Java SE specification and must be explicitly added with `--add-modules`.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
jdk.jfr
Why it's wrong here
Incorrect: jdk.jfr is a JDK-specific module but is included with --release 17.
- ✓
jdk.incubator.foreign
Why this is correct
Correct: Incubator modules are not included when using --release.
- ✗
java.net.http
Why it's wrong here
Incorrect: java.net.http is a standard module included with --release 17.
- ✗
java.sql
Why it's wrong here
Incorrect: java.sql is a standard module included with --release 17.
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