1Z0-811 What is Java Practice Question
Which TWO are characteristics of the Java Runtime Environment (JRE)?
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
✓
It is necessary to run any Java application.
Options D and E are correct. The JRE (Java Runtime Environment) is necessary to run any Java application (D) and it contains the JVM and core class libraries (E). Option A is incorrect because the Java compiler (javac) is part of the JDK, not the JRE. Option B is incorrect because although the JRE is smaller than the JDK, this is a relative comparison and not a defining characteristic of the JRE itself. Option C is incorrect because the debugger is included in the JDK, not the JRE.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It includes the Java compiler (javac) for compiling source code.
Why it's wrong here
javac is part of JDK, not JRE.
- ✗
It is smaller in size compared to the JDK.
Why it's wrong here
JRE is smaller than JDK because JDK includes JRE plus tools.
- ✗
It provides a debugger for troubleshooting code.
Why it's wrong here
Debugger is part of JDK.
- ✓
It is necessary to run any Java application.
Why this is correct
JRE provides the runtime required to execute Java programs.
- ✓
It contains the JVM and core class libraries.
Why this is correct
JRE is the runtime environment consisting of JVM and standard libraries.
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