Questions on Key Features Problems (KFP) are an important component of the theory paper for Part 1 of the membership examination of the Academy of Family Physicians of Malaysia (MAFP) and the Fellowship for the Royal Australian College of General Practitioners (FRACGP).This paper will attempt to provide information on the format and marking scheme of KFP. Expected answers for some KFP cases will be discussed and common errors made by candidates highlighted with suggestions on how to avoid them.