@yankee-Some states have their own ethics exam like California, and some use the AICPA's ethics exam. I think TN uses the AICPA's ethics exam. From what I've heard, the AICPA ethics exam is easier than the CA ethics exam.
Some tips for those taking the CA ethics exam: Definately get the pdf version, and make sure when you read the question that you identify if its asking about CPAs in general, or CPA's speficially in California. There are slightly different conflict of interest rules and specific discipline/licensing/CPE rules for CPAs in California. Also, mark every single question with the chapter number and page reference where you think you found the answer. If you fail, you get a report of which chapters or sections you need to revisit. The chapters listed on the report are in the order of the questions you got wrong, so if you know what chapters everything came from, and you know which questions you felt shaky about, you can kind of narrow it down that way. Also, you have 6 free tries, so dont try to change too many answers at once. Change a few that you are most uncertain about, resubmit, and keep going from there. Nothing is more frustrating than getting a lower score the 2nd or 3rd time because you changed a correct answer.