this is a fill in the black question.

Question

1) The result of compiling a java source file is a file with the extension that contains

Answer 1

what, haven't you compiled any java source files yet? What come out?

Answer 2

there's no java code for this question

Answer 3

so what? They would not ask you such a question if you were not familiar with java code and compiling it (with javac).

If still unsure, just google the topic. Or run javac on some of your own java code.