The written test
You answer multiple-choice questions. You get three tries.
After that you must apply again. If you are under 18, you wait
seven days after a fail before you try again (not counting
the day you failed).
You may not use the handbook or a phone during the test. They also test
your vision.
On this site, a practice test like the real one is 36 questions
with 6 misses allowed for an adult Class C. Confirm what the DMV
will give you when you apply — under-18 tests can be longer.
Practice that test here, free. A right answer passes without comment, the same way the real test does; a miss is explained where it happens, because that is the moment it teaches.