Take some example test questions here:
http://skilldrill.com/category/ViewExamInfo.asp?e=876
By the way if any of you try the drills please give them some feedback. I get the feeling they haven’t heard from too many Mac techs. Many of the questions are worded in a very “microsoft-y” way. They would probably appreciate the Mac point of view.
UPDATE!!
It would appear that they have taken the site down as this link no longer works.