1Z0-829 Java Platform Overview and Packaging Practice Question
A Java application is developed using Java SE 17. It uses only standard Java APIs and no external libraries. The application runs without errors in the development environment. When deploying to a production server, which minimal Java environment is sufficient?
⚠ Common exam trap
A common mix-up: candidates confuse the JVM with the JRE, thinking a standalone JVM can run Java applications, but the JVM requires the runtime libraries packaged in the JRE to resolve standard classes like `java.lang.String`.
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
✓
Java Runtime Environment (JRE)
A Java application compiled into bytecode (`.class` files) requires only the Java Runtime Environment (JRE) to execute. The JRE includes the Java Virtual Machine (JVM), core libraries, and supporting files, but not development tools like the compiler. Since the application is already compiled and uses only standard APIs, no additional tools are needed at runtime.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Java compiler (javac)
Why it's wrong here
The compiler is used for development, not for running an application.
- ✗
Java Virtual Machine (JVM) only
Why it's wrong here
JVM alone does not include core libraries needed to run Java code.
- ✗
Java Development Kit (JDK)
Why it's wrong here
JDK includes development tools not required for running the application.
- ✓
Java Runtime Environment (JRE)
Why this is correct
JRE provides JVM and all necessary libraries to run Java applications.
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