Introduction to SQL course is bugged. What should I do?

Question

At the "Introduction to SQL" course, a question does not appear in the first exam. That's why I can't move forward. What should I do or when will this problem be fixed?

Answer 1

You can try the course from the beginning, see if that changes anything.
If not, clear your cache, try again, make sure your internet connection is good.
If that doesn't help, can you email [e-mail] with screenshots.

Answer 2

it's probably about inequality (<>), which surprised me when it was required before it was introduced later on.
You can google for answers, which have the added benefit of sharpening your google-fu as well as learning other things not taught in the course.