The official website of the California Department of Motor Vehicles provides sample questions for commercial, regular and motorcycle driver's license written tests. All of the test questions are taken from the California Driver Handbook, which is also provided on the site.
The sample questions are available in English, Spanish and American Sign Language. Persons with disabilities may also complete the knowledge test by listening to an audio tape or by having an instructor ask the questions instead of reading the written test. The audio test is available in a number of languages, including Arabic, German, Japanese, Turkish and Korean. Aside from the free sample questions on the California DMV site, DMV.org also offers a California practice test packet that includes 100 practice questions for a minimal fee.