A candidate reads that DGT's online test is similar in format and quantity to the real exam, while DGT moped educational material states the current AM questionnaire has 20 questions. What is the best exam-prep conclusion?

1. Practise the 20-question format, but do not treat online practice tests as a guaranteed copy of the official exam
2. Memorise two free tests only because the official exam cannot differ
3. Ignore AM-specific rules because all theory tests are the same
4. Assume the AM test has 50 questions because some common tests can be longer