20+ practice questions focused on Java Platform Overview and Packaging — one of the most tested topics on the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Java Platform Overview and Packaging PracticeA company uses CI/CD to build and package a Java 17 application. They want to produce a single executable JAR that includes all dependencies. Which tool should be used to achieve this?
Explanation: The Maven Shade Plugin (B) is the correct choice because it creates an uber-JAR (fat JAR) by merging all project dependencies into a single executable JAR, including transitive dependencies. It also provides a relocation feature to avoid classpath conflicts, which is essential for producing a self-contained artifact for deployment.
A developer has a module named 'com.example.app' that exports a package 'com.example.api'. Another module 'com.example.client' requires 'com.example.app'. Which directive must be in the module-info.java of 'com.example.client'?
Explanation: Option D is correct because the 'requires' directive in a module-info.java file declares a dependency on another module. For 'com.example.client' to access the exported packages of 'com.example.app', it must include 'requires com.example.app;'. This is the standard mechanism for module dependency in the Java Platform Module System (JPMS).
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?
Explanation: Option D is correct because when a required module is missing from the module path in Java 17, the module system throws `ModuleNotFoundException` during the resolution phase at startup. This exception is specific to the Java Platform Module System (JPMS) and indicates that a module declared in `requires` clauses cannot be located.
A development team wants to ensure that a Java 17 application runs with a specific set of modules. They want to minimize the footprint by including only necessary modules. Which tool should they use?
Explanation: B is correct because jlink is the Java tool specifically designed to assemble and optimize a custom runtime image containing only the modules explicitly required by an application. It analyzes module dependencies and produces a minimal JRE, reducing footprint by excluding unused modules, which aligns with the team's goal of minimizing size.
A Java 17 application is packaged as a JAR with a Main-Class manifest entry. The JAR is run using 'java -jar app.jar'. However, the application throws a NoClassDefFoundError for a class that is inside the JAR. What is the most likely cause?
Explanation: Option C is correct because a NoClassDefFoundError for a class that is inside the JAR indicates that the class file exists in the JAR manifest but cannot be loaded due to corruption. When using 'java -jar', the JVM reads the JAR file directly; if the JAR is corrupt (e.g., truncated, CRC mismatch, or invalid ZIP entry), the class loader fails to read the class bytes, throwing NoClassDefFoundError even though the class is listed in the JAR.
+15 more Java Platform Overview and Packaging questions available
Practice all Java Platform Overview and Packaging questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Java Platform Overview and Packaging. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Java Platform Overview and Packaging questions on the 1Z0-829 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Java Platform Overview and Packaging is tested as part of the Oracle Certified Professional Java SE 17 Developer 1Z0-829 blueprint. Practicing with targeted Java Platform Overview and Packaging questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Java Platform Overview and Packaging is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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