Question 200 of 481
1Z0-811 What is Java Practice Question
A developer has written a Java program that uses third-party libraries. Which TWO actions are necessary to run the program on a different machine? (Choose two.)
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
✓
Set the PATH environment variable to include the java executable
Options C and D are correct. To run a Java program, the JRE must be installed (D) because it provides the Java Runtime Environment including the JVM. The PATH must include the java executable's directory (C) so that the 'java' command can be invoked. Option A is incorrect because .class files alone are insufficient; third-party libraries (JARs) are also needed and must be accessible. Option B is incorrect because the JDK (Java Development Kit) is only needed for compilation and development, not for running. Option E is incorrect because source files are not required to run the compiled program.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Copy only the .class files of the program
Why it's wrong here
Third-party libraries are also required; .class files alone may not suffice.
- ✗
Install the JDK
Why it's wrong here
JDK is for development; JRE suffices for running.
- ✓
Set the PATH environment variable to include the java executable
Why this is correct
The system must find the java command.
- ✓
Install the JRE
Why this is correct
A Java program, once compiled into bytecode, requires a Java Runtime Environment (JRE) to execute. The JRE comprises the Java Virtual Machine (JVM) and core Java class libraries. Installing the JRE on the target machine provides the necessary runtime components to interpret and execute the bytecode, including that of the main program and any third-party libraries, enabling the program to run successfully on a different machine.
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Copy the .java source files
Why it's wrong here
Source files are not needed for execution; compiled code is used.
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Last reviewed: Jun 23, 2026
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