Certification to be a Certified Nursing Assistant (CNA) vary from state to state. Someone who wants to become a CNA must pass the CNA course. This course is a 75-hour course and it can take up to three months to complete. This might be held at the hospital in which you will be working, a college or at a vocational school. After you finish this course, you have to pass a test called a theoretical exam. This test can take up to 2 hours. Once that one is passed, there is another test called a clinical exam. Before you can get your CNA license, you also have to pass a physical exam. You have to be healthy in order to take care of other people. Once you pass everything and get your CNA license, you will also be in the state CNA registry so you can work as a CNA anywhere in that state. Make sure you check your state’s requirements. The state requirements do vary from state to state.