A: Hi Palmas69,

Here are the answers:

1) Allow the import of external questions in CSV or AIKEN format of hundreds of questions (I often have to extract the questions from very long PDF files made available by the local administrations)

We do support question / answer import via CSV.

We support these types:
single_choice
multiple_choice
text
rating
ranking_choice
yes_no
slider

2) Allow the user to keep a database of given answers (for the last "x" days)

Yes, we've a student dashboard feature where students can login and find their answers / results to quizzes they have completed.

3) Desirable feature😉: being able to allow the user to create quizzes with ONLY the wrong answers they gave in the last "x" tests! But I understand that this feature is very difficult to implement...

We don't support this and don't have any plans to do so. Sorry.

4) Allow to customize the final global score according to a score attributed to each answer (e.g. on an exam with 10 questions: from 1 to 3 correct answers ---> "bad"; from 4 to 6 ---> " weak"; 7 to 10 ---> "good")

You can do this using a scoring quiz.

You can create an outcome screen for each range (1-3, 4-6, 7-10) and show different messages in each screen.

Hope this helps.

-Veena