Certification exam

Ive been looking and cant seem to find the answer as to what is the basis for the written test for certified ?  I dont have a study guide like I did for intro so not clear on what to study.  As far as the service exam, what are we to provide vs what is being provided??  Serviettes,  glasses, coasters, wine key etc......  Im sure ill bring my own key, but not clear on what is provided.  Thank you and sorry if this is answered already and I just didnt find it.