For every practice test your take, you will increase your chances of passing the official DMV license test without any problems. Studies have shown that users who study for 2 weeks or more and take at least 10 online practice tests has an advantage over those who studied less than 2 weeks and just read the driver handbook.
Be smart, don't risk a no-passing score on your DMV examination, when it is so easy to learn quickly with these reliable CA permit practice tests:
Download a work sheet with 36 California DMV questions and answers: