Try our free Cosmetologist Practice Test to see the type of questions that are on a cosmetology licensing or certification test. Most states require cosmetologists to take a two-part exam to become licensed or certified. The first part is a written multiple-choice exam covering such subjects as skin structure, nail structure, haircutting, facials and sanitation. The second part is a hands-on exam where a cosmetology candidate needs to demonstrate knowledge and skill in such things as haircutting, color application and manicure.