1Z0-811 What is Java Practice Question
During execution, the JVM uses Just-In-Time (JIT) compilation. What is its primary benefit?
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
✓
Improves execution speed by compiling frequently used bytecode to native code.
JIT compilation improves execution speed by compiling frequently used bytecode into native machine code at runtime. Option A is incorrect because JIT does not translate bytecode into an intermediate language; it compiles to native code. Option C is incorrect because JIT compiles bytecode, not source code. Option D is incorrect because JIT's primary purpose is performance, not security.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Translates bytecode into an intermediate language for interpretation.
Why it's wrong here
JIT compiles to native code, not another intermediate language.
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Improves execution speed by compiling frequently used bytecode to native code.
Why this is correct
JIT identifies hot spots and compiles them for faster execution.
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Converts Java source code directly into bytecode.
Why it's wrong here
javac does source to bytecode compilation.
- ✗
Enhances security by verifying bytecode integrity.
Why it's wrong here
Bytecode verification is a separate step, not JIT.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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