OH requires an ORAL juris prudence exam (i.e. questions about the laws specific to OH that apply to psychologists). Evidently there are quite a few other states that require some type of oral or written exam, here is some additional information about oral exams: http://www.apa.org/gradpsych/2009/03/oral-exam.aspx
Every state should have a brochure/document/book that includes what you need to know for their oral/written exam.
I do know someone who failed it….whoops. They just glanced at the documentation and then got tripped up on some of the details. If someone can pass the EPPP, most/all state level exams should be cake if you read through the applicable information.