I have checked different existing posts on the topic and none of them really clearly address that point. With the increase of online exams, there has been an increased of exam questions asked and fully answered here. An example of such a question but not answered can be found there: Find the solution of matrix equation which matches vector span This was clearly admitted by the OP in a comment.
The issue with that is that sometimes some complete solutions are posted within minutes while some other people were commenting that the OP should at least put their effort. Which is a proper way of delaying everything.
My question is: how to avoid that someone provides a complete solution to exam questions too early?
Adding a delay would be a solution as exams are often time limited and that time is rather short. Unfortunately that would not solve entrance exams where this time is long.
Should a box message should be placed as a warning that this could be an exam question to refrain people from answering and should negative points awarded to people answering the questions too early? That would refrain people from answering those questions during the embargo time.
Maybe none of those suggestions is acceptable for some reason I ignore and some others would be preferable.
All in all, I think that this platform is great but it should not serve this purpose.