Sometimes it is logically necessary to have the answer choices of a multiple-choice question presented in the same order every time the question is asked, but it can be more interesting (and challenging) if the answer choices appear in a random order each time the question is presented.
The default behavior of the AppletQuiz applet is to present the questions and multiple-choice answer choices in the order that you type them in the question file. However, AppletQuiz will randomly scramble question order, as well as randomly scramble multiple-choice answer choices (and keep track of the correct answer!) after you specify a few simple parameters.