If you forget to sign your name after the fourth exam, you can sign it again. After the exam, I signed that I would take the exam and accept the results. Not signing means giving up your grades. Subject 4, also known as theory test and driver theory test, is a part of motor vehicle driver's license test. After the implementation of OrderNo.. The Ministry of Public Security 123, in addition to the road test, considered "automobile ethics", added the safe and civilized driving test, commonly known as "subject 4". Because this exam is conducted after subject three, we are used to calling it subject four exam. There are 50 questions in the examination paper, which are mainly presented in the form of cases and animations. Full mark 100, passing mark 90.