Question 170 of 519

Java Platform Overview and Packaging →hardMultiple ChoiceObjective-mapped

1Z0-829 Java Platform Overview and Packaging Practice Question

This 1Z0-829 practice question tests your understanding of java platform overview and packaging. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 team is developing a large enterprise application using Java 17. The application consists of multiple modules: core (provides logging and configuration), services (business logic), and web (REST endpoints). The modules are packaged as separate JAR files and deployed on a server. During runtime, the web module throws a java.lang.ClassNotFoundException for a class that is part of the core module. The core module's module-info.java exports the package containing the missing class. The web module's module-info.java requires core. However, the services module also needs the same class but uses a different version of it, causing conflicts. The team decides to use the class path for the conflicting package and the module path for the rest. They add the conflicting JAR to the class path and keep the other JARs on the module path. After this change, the web module still cannot find the class, but the services module works fine. What is the most likely cause of the issue?

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.

A
The services module is using an automatic module, which automatically reads the unnamed module, while the web module is a named module that does not.
Why wrong: Even if the services module were automatic, the web module being named still cannot access the class path package if it is split.
B
The class path is not scanned for JAR files unless the module path is empty.
Why wrong: The class path is always scanned for classes, but named modules cannot access classes from the class path if the package is split.
C
The web module is a named module and cannot access classes from a split package that is also in the unnamed module.
The module system prevents named modules from accessing split packages from the class path to maintain reliable configuration.
D
The core module's module-info.java does not export the package to the web module; it only exports it to all modules.
Why wrong: The export to all modules should allow the web module to access it, but the issue is the split package, not the export.

Full breakdown with real-world context →

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 web module is a named module and cannot access classes from a split package that is also in the unnamed module.

Option C is correct because when a named module (the web module) is on the module path, it cannot access classes from the unnamed module (the class path) if those classes belong to a package that is also exported by another named module on the module path. This creates a split package, which is forbidden by the Java module system. The core module exports the package, so the web module cannot load the class from the class path JAR, resulting in ClassNotFoundException.

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 services module is using an automatic module, which automatically reads the unnamed module, while the web module is a named module that does not.
Why it's wrong here
Even if the services module were automatic, the web module being named still cannot access the class path package if it is split.
✗
The class path is not scanned for JAR files unless the module path is empty.
Why it's wrong here
The class path is always scanned for classes, but named modules cannot access classes from the class path if the package is split.
✓
The web module is a named module and cannot access classes from a split package that is also in the unnamed module.
Why this is correct
The module system prevents named modules from accessing split packages from the class path to maintain reliable configuration.
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 core module's module-info.java does not export the package to the web module; it only exports it to all modules.
Why it's wrong here
The export to all modules should allow the web module to access it, but the issue is the split package, not the export.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often think the issue is about module visibility (exports) or class path scanning order, but the real constraint is the split package rule, which prevents a named module from accessing a package that is already defined by another named module on the module path.

Detailed technical explanation

How to think about this question

Under the Java module system, a split package occurs when a package is defined in both a named module and the unnamed module (or in multiple named modules). The JPMS (Java Platform Module System) strictly prohibits split packages to ensure reliable configuration and encapsulation. When the web module requires the core module, it sees the package as belonging to the core module, so any attempt to load the same package from the class path is blocked, leading to ClassNotFoundException. This is enforced by the module layer at runtime, not by the class loader alone.

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 practitioner preparing for the 1Z0-829 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

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.

Related 1Z0-829 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Handling Date, Time, Text, Numeric and Boolean Values practice questions

Practise 1Z0-829 questions linked to Handling Date, Time, Text, Numeric and Boolean Values.

Controlling Program Flow practice questions

Practise 1Z0-829 questions linked to Controlling Program Flow.

Utilizing Java Object-Oriented Approach practice questions

Practise 1Z0-829 questions linked to Utilizing Java Object-Oriented Approach.

Handling Exceptions practice questions

Practise 1Z0-829 questions linked to Handling Exceptions.

Working with Arrays and Collections practice questions

Practise 1Z0-829 questions linked to Working with Arrays and Collections.

Working with Streams and Lambda Expressions practice questions

Practise 1Z0-829 questions linked to Working with Streams and Lambda Expressions.

Java Platform Overview and Packaging practice questions

Practise 1Z0-829 questions linked to Java Platform Overview and Packaging.

Java I/O API and Securing Applications practice questions

Practise 1Z0-829 questions linked to Java I/O API and Securing Applications.

1Z0-829 fundamentals practice questions

Practise 1Z0-829 questions linked to 1Z0-829 fundamentals.

1Z0-829 scenario practice questions

Practise 1Z0-829 questions linked to 1Z0-829 scenario.

1Z0-829 troubleshooting practice questions

Practise 1Z0-829 questions linked to 1Z0-829 troubleshooting.

Practice this exam

Start a free 1Z0-829 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

1Z0-829 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this 1Z0-829 question test?

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: The web module is a named module and cannot access classes from a split package that is also in the unnamed module. — Option C is correct because when a named module (the web module) is on the module path, it cannot access classes from the unnamed module (the class path) if those classes belong to a package that is also exported by another named module on the module path. This creates a split package, which is forbidden by the Java module system. The core module exports the package, so the web module cannot load the class from the class path JAR, resulting in ClassNotFoundException.

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.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Keep practising

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

This 1Z0-829 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-829 exam.