My question is short: is it possible in exams2moodle use drag&drop question type (or is it a plan)?
For example: with tikzpicture generate a circle with some lines (chord, secant, tangent, radius, diameter, see here) and students should drag&drop these lines names.
At the moment (R/exams version 2.4-0) this is not implemented. It is on our wishlist but there are no immediate plans to implement it soon.