Why does SL not remove all "Undefined Behaviour" quizzes?

Question

Example:

i = ++i + i++;

This is undefined behaviour in C++11.

Answer 1

I agree that there should be less of these quizzes. However, I doubt that they will be removed if already approved. :<

Answer 2

There should be a lot of people doing it. Code like that does not even compile in Java if I am not mistaken. There is no learning involved in this either...

Answer 3

try to email the sololearn team may be the remove it.