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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. 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.

Network Topology
`javamodule-path modsadd-modules com.example.store -m com.example.payment/com.example.payment.Main`Refer to the exhibit.```module com.example.store {exports com.example.store.apirequires com.example.paymentAnd the java invocation:

Given the module descriptor for com.example.payment:

module com.example.payment { exports com.example.payment; // does not require com.example.store

}

And the Main class is in the unnamed module (on the classpath). The invocation is:

java --add-modules com.example.store --module-path mods -cp classes com.example.Main

What will happen?

Network Topology
`javamodule-path modsadd-modules com.example.store -m com.example.payment/com.example.payment.Main`Refer to the exhibit.```module com.example.store {exports com.example.store.apirequires com.example.paymentAnd the java invocation:

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 application runs successfully because com.example.store is added with --add-modules, and its exported packages are available.

Option A is correct because the `--add-modules com.example.store` directive explicitly adds the module `com.example.store` to the set of root modules at startup, making its exported packages available to the unnamed module (or to modules that do not otherwise require it). Since the `Main` class is in the unnamed module (not in a named module), it can access the exported packages of `com.example.store` without a `requires` clause. This is the intended behavior of `--add-modules` for resolving modules that are not automatically resolved.

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 application runs successfully because com.example.store is added with --add-modules, and its exported packages are available.

    Why this is correct

    --add-modules makes com.example.store available to other modules, including the main module.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The application throws NoClassDefFoundError because the Main class is in a different module.

    Why it's wrong here

    The main class is specified correctly as com.example.payment/com.example.payment.Main.

  • ✗

    The application runs successfully because com.example.store is on the module path.

    Why it's wrong here

    It runs, but not because of that reason; the main module is payment.

  • ✗

    The application throws ModuleNotFoundException because com.example.store is not required by com.example.payment.

    Why it's wrong here

    Although not required, --add-modules adds it anyway; it's optional.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume that simply placing a module on the module path makes it automatically accessible to the unnamed module, but the module system requires explicit opt-in via `--add-modules` for modules not required by a named module.

Detailed technical explanation

How to think about this question

Under the hood, the Java module system uses a set of root modules to determine which modules are resolved at startup. The unnamed module (where the application's main class resides if not in a named module) cannot access modules that are not root modules unless they are explicitly added via `--add-modules`. This mechanism is defined in the Java Language Specification (JLS) and the Java Virtual Machine Specification (JVMS). A real-world scenario is when a legacy application (unnamed module) needs to use a library that has been modularized; `--add-modules` bridges the gap without requiring the application to be modularized.

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.

Visual reference

Client Recursive Resolver Root DNS (13 root servers) TLD DNS (.com, .org, …) Authoritative example.com query IP addr answer

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.

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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 application runs successfully because com.example.store is added with --add-modules, and its exported packages are available. — Option A is correct because the `--add-modules com.example.store` directive explicitly adds the module `com.example.store` to the set of root modules at startup, making its exported packages available to the unnamed module (or to modules that do not otherwise require it). Since the `Main` class is in the unnamed module (not in a named module), it can access the exported packages of `com.example.store` without a `requires` clause. This is the intended behavior of `--add-modules` for resolving modules that are not automatically resolved.

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.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 25, 2026

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