- A
ExceptionInInitializerError
Why wrong: ExceptionInInitializerError is thrown when a static initializer fails, not due to a missing module at startup.
- B
NoClassDefFoundError
Why wrong: NoClassDefFoundError occurs when a class that was available at compile time is missing at runtime, not during module resolution.
- C
ClassNotFoundException
Why wrong: ClassNotFoundException is thrown when an application tries to load a class by name, not for module resolution.
- D
ModuleNotFoundException
ModuleNotFoundException is not a standard Java exception; the correct exception is java.lang.module.FindException.
Question 300 of 519
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 deployed on a server. The application uses modules but one required module is missing from the module path. Which exception will be thrown at startup?
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
✓
ModuleNotFoundException
None of the listed exceptions are correct. When a required module is missing from the module path during startup in Java 17, the module system throws `java.lang.module.FindException`, not `ModuleNotFoundException`. `ExceptionInInitializerError` occurs during static initialization, `NoClassDefFoundError` when a class is missing at runtime, and `ClassNotFoundException` at class loading. `ModuleNotFoundException` is not a standard Java exception.
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.
- ✗
ExceptionInInitializerError
Why it's wrong here
ExceptionInInitializerError is thrown when a static initializer fails, not due to a missing module at startup.
- ✗
NoClassDefFoundError
Why it's wrong here
NoClassDefFoundError occurs when a class that was available at compile time is missing at runtime, not during module resolution.
- ✗
ClassNotFoundException
Why it's wrong here
ClassNotFoundException is thrown when an application tries to load a class by name, not for module resolution.
- ✓
ModuleNotFoundException
Why this is correct
ModuleNotFoundException is not a standard Java exception; the correct exception is java.lang.module.FindException.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may confuse module-level errors with class-level errors, but the actual exception for a missing module is FindException, not any of the listed options.
Detailed technical explanation
How to think about this question
The JPMS module resolution occurs at startup before any application code runs; the module system reads `module-info.class` files and resolves `requires` directives. If a required module is absent from the module path, the resolver throws `ModuleNotFoundException` as part of the `LayerInstantiationException` chain. In real-world scenarios, this often happens when a library's automatic module name does not match the expected module name in `module-info.java`, or when a module is accidentally omitted from the `--add-modules` JVM argument.
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.
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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: ModuleNotFoundException — None of the listed exceptions are correct. When a required module is missing from the module path during startup in Java 17, the module system throws `java.lang.module.FindException`, not `ModuleNotFoundException`. `ExceptionInInitializerError` occurs during static initialization, `NoClassDefFoundError` when a class is missing at runtime, and `ClassNotFoundException` at class loading. `ModuleNotFoundException` is not a standard Java exception.
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 11, 2026
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