Final answer:
In California, if you are at least 18 years old and hold an instruction permit, you can take the behind-the-wheel driving test immediately after obtaining the permit.
Step-by-step explanation:
If you are at least 18 years old and have just obtained a California instruction permit, you are eligible to take the behind-the-wheel driving test for a driver license immediately. Once you feel prepared and are confident in your driving skills, you can schedule and take the driving test. This is different from the rules for minors, who are required to hold their permit for six months before taking the driving test.