About the California Contractor License Exam. ​In order to qualify for a license you are required to take and pass a test administered by the Contractor State License Board.The California contractor license exam is challenging and most people need some outside assistance or study material in order to pass it.Contractor State License Center has been a contractor school in Los Angeles for over 20 years.he tests are multiple-choice. That is, you choose A, B, C, or D. There is no writing. The law test will consist of about 125 questions. The trade exams vary in length depending on your classification. There are about 80 to 125 questions on the trade, on average.