The question catalog is licensed by TÜV / DEKRA and is guaranteed to contain the complete official question catalog for all driving license classes.
For all classes together there are altogether approx. 1,700 questions, for class B there are e.g. approx. 1,150 questions.
The question catalog is updated by TÜV / DEKRA usually twice a year, on April 1 and October 1. About 60 questions are deleted and about 60 new questions are added. Over 90% of the questions remain unchanged during an update.
Translated with www.DeepL.com/Translator (free version)