1Z0-829 Java Platform Overview and Packaging Practice Question
This 1Z0-829 practice question tests your understanding of java platform overview and packaging. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 developer is migrating a classpath-based application to modules. They have two JARs on the classpath that both contain a package with the same name, com.example.util. When they move both JARs to the module path, they encounter a module resolution error. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Named modules cannot have split packages
In the Java module system, a package can be defined in at most one module on the module path. When both JARs contain com.example.util, moving them to the module path creates a split package, which is illegal for named modules. The module system enforces this to ensure reliable configuration and encapsulation, resulting in a module resolution error.
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.
✗
The --add-exports option is missing
Why it's wrong here
--add-exports grants access to non-exported packages, but the error is about split packages.
✓
Named modules cannot have split packages
Why this is correct
Both JARs become automatic modules (named), and split packages are disallowed among named modules.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The JARs need to be merged into one module
Why it's wrong here
Merging is a workaround but not the cause of the error.
✗
Automatic modules cannot have split packages
Why it's wrong here
While true, the issue applies to all named modules, not just automatic.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the distinction between named modules and automatic modules, and the trap here is that candidates incorrectly assume automatic modules have the same split-package restrictions as named modules, when in fact automatic modules are more lenient to ease migration.
Detailed technical explanation
How to think about this question
Under the hood, the module system reads module-info.class or derives module names from JAR filenames for automatic modules. When two named modules export the same package, the module graph becomes ambiguous, violating the unique package-to-module mapping required by the Java Language Specification (JLS §7.7.1). In real-world scenarios, this often occurs when migrating legacy libraries like commons-logging and log4j that share packages, forcing developers to use the classpath or modularize via --patch-module.
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: Named modules cannot have split packages — In the Java module system, a package can be defined in at most one module on the module path. When both JARs contain com.example.util, moving them to the module path creates a split package, which is illegal for named modules. The module system enforces this to ensure reliable configuration and encapsulation, resulting in a module resolution error.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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