Theory textbook, road signs, key terms, fines and official sources.
Tactics for the test itself: how to spend the clock, and what to do when the answer will not come.
Go through the test and answer everything that is obvious to you. Leave anything you have to think about for a second pass. There is less time than it feels like.
If a question is written in tangled language, ask the examiner to explain it — that is allowed. Some wordings are poor enough that native Spanish speakers miss them too.
Not a single one. An unanswered question always counts as wrong, while picking at random is still a 33.33% chance of landing on the right answer.
These are statistical leanings, not rules. They improve your odds, but they will not be right every time.
Use them only when you genuinely have no idea how to answer.
Rule out options with absolute words — they sit in wrong answers far more often than in right ones.
A hedge like “as a general rule” leans the other way: more often right than wrong.
All else being equal, pick the longer option.