Q
What does a JIT (Just-In-Time) compiler do?
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A
It checks syntax only, without generating any code
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B
It compiles intermediate code (such as bytecode) into native machine code while the program is running
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C
It compiles all source code to machine code before distribution
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D
It converts machine code back into source code
Correct Answer:
B. It compiles intermediate code (such as bytecode) into native machine code while the program is running
Explanation:
JIT compilers (in the JVM or .NET CLR, for example) translate hot bytecode to native code at run time for speed.
