Can I make challenges for incomplete courses?

Question

Can I make challenge by using incomplete course as my weapon ? If yes, when challenged, will I get only questions from completed/learned topics or including even questions from not learned yet topics ?

Answer 1

Yes, you can. But your progress is not taken into account.

Answer 2

so that means it’s better not to challenge till I complete the course and cover all topics.
otherwise I will loss every challenge because of encountering questions from topics that I donn’t learn yet.