The correct command is `jlink --module-path $JAVA_HOME/jmods:app --add-modules com.myapp --output myimage`. This works because `jlink` with `--add-modules` specifies the root module (here, `com.myapp`), and when combined with a module path that includes both the JDK's jmods directory and the application JAR, it automatically resolves all transitive dependencies—including `java.sql`—to produce a truly minimal runtime image containing only the required modules. On the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam, this question tests your understanding that `jlink` does not require you to manually list every dependent module; the tool handles transitive resolution for you. A common trap is thinking you must explicitly add `java.sql` or use `--add-modules java.sql`, but that would be redundant and could lead to a larger image. Memory tip: think of `--add-modules` as the entry point—just name your application module, and jlink will pull in everything it needs.
1Z0-829 Java Platform Overview and Packaging Practice Question
This 1Z0-829 practice question tests your understanding of java platform overview and packaging. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A Java 17 application is packaged as a modular jar and deployed on a system with the full JDK. The application uses the java.sql module. The system administrator wants to minimize the footprint by creating a custom runtime image using jlink. Which command would create an image with only the necessary modules?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Option A is correct because `jlink` with `--add-modules com.myapp` and the module path pointing to both `$JAVA_HOME/jmods` and the application JAR automatically resolves all transitive dependencies, including `java.sql`, and creates a minimal runtime image containing only the required modules. The `--output myimage` specifies the target directory for the custom image.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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-MODULE-PATH includes all modules on the path, making the image larger than necessary.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think `--bind-services` is required for modular applications or that explicitly listing `java.sql` is sufficient, but they overlook that the application module itself must be the root for proper dependency resolution.
Detailed technical explanation
How to think about this question
Under the hood, `jlink` uses the module graph resolution algorithm from the Java module system to compute the transitive closure of required modules starting from the root modules specified with `--add-modules`. It then links only those modules into the output runtime image, stripping out unused classes, resources, and native libraries. In real-world scenarios, this is critical for deploying Java applications in containers or embedded systems where disk space and startup time are constrained.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Java Platform Overview and Packaging — This question tests Java Platform Overview and Packaging — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: jlink --module-path $JAVA_HOME/jmods:app --add-modules com.myapp --output myimage — Option A is correct because `jlink` with `--add-modules com.myapp` and the module path pointing to both `$JAVA_HOME/jmods` and the application JAR automatically resolves all transitive dependencies, including `java.sql`, and creates a minimal runtime image containing only the required modules. The `--output myimage` specifies the target directory for the custom image.
What should I do if I get this 1Z0-829 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "which command", "minimum / minimize". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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