The District of Columbia DMV practice test categorized as written test, Knowledge test, road test and vision screening. The written test consists of the questions regarding road rules, traffic laws, road signs and driving practices. The minimum age to apply is 16 years. The test does consists of 25 questions in which 20 of them need to answer correctly and have to attain a passing score of 80%.
Go through new versions of the Highway Code and practice all the DMV Permit Tests for several times for better results.