California Driver License (DMV) Written Practice Test

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Ace your California DMV written test! Prepare for the exam by practicing hundreds of multiple-choice questions covering traffic laws and road signs. Boost your knowledge, gain confidence, and increase your chances of passing the test on your first try.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following is true about driving under the influence of drugs or alcohol?

It is safer than driving without such impairment
It is illegal and dangerous
It is a preferred safe driving practice
It can help improve your reaction time

The correct answer is: It is illegal and dangerous

Driving under the influence of drugs or alcohol is not only illegal, but also very dangerous. It impairs a driver's judgement, coordination, and reaction time, increasing the risk of accidents. Choosing option A is incorrect because driving under the influence is never safer than driving without impairment. Option C is also incorrect because it is not a safe driving practice, but rather a dangerous and illegal one. Option D is incorrect because while some may falsely believe it helps improve reaction time, in reality it decreases coordination and slows down reaction time, making it a dangerous choice.