If you haven't already tried the following online DMV sample tests, do so. They will significantly increase your chances of passing the official California DMV permit test or Driver License test. Look closer at the answers you get wrong, read the explanation, and then compare with the information in the driver handbook published by California Department of Motor Vehicles (www.dmv.ca.gov). This is an area that you should focus more on.
Download a work sheet with 36 California DMV questions and answers: