Quite apart from the "Please correct my essay" questions, which are obviously and egregiously off-topic, I think there's a right way and a wrong way to ask questions relating to exams.
A question asking "How do I pass this exam? What answer is the examiner looking for?" is the wrong way. We are not experts in every syllabus and marking scheme.
A question which would be on-topic here would be one asking about the English involved. "What is wrong with my answer to X? I encountered that question in an exam and wrote Y, because Z. My dictionary/textbook/course notes include A and B which appear to support my conclusion. Was I right? Is it possible to determine why the 'correct' answer was actually Q?" Include links to dictionaries and textbooks and even the question if possible. Such a question could be more speculative ("I'm expecting to be asked...") which might preclude mentioning Q, but everything else could be included.
At the risk of being slightly unfair, let's use a concrete example.
This is a common IELTS exam question: do you play any sports?
How do you answer that if you're a professional swimmer? In my mind 'playing sports' implies team sports (I play football, I play basketball, etc.), you don't say "I play swimming".
So, the the point:
- Do you play any sports?
- I do/I don't...
Yes, they do expect you to answer "do you..." questions with "I do, I don't...".
That, I think, is more of the first form than the second, although it's a far better question than a simple "What's the answer?" request. There has been some analysis of the problem. But it is slightly muddled: it's asking whether sports means "team sports" and whether team sports includes swimming. It does include my A and B with "'Do you...' questions need 'I do/don't'", but the main question is explicitly "How do I answer, What is the examiner looking for?"
Even if it's possible to explain the problem in a more structured way, I don't think we can get away from the "How do I answer this?" issue.
A common IELTS exam question is "Do you play any sports?"
IELTS expects questions starting "Do you..." to be answered using the main verb (play in this case) with "I don't" if that's needed.
"Do you play any sports?"
→ "Yes, I play football."
→ "No, I don't play anything like that."
In my mind, play any sports implies a team sport like football or basketball. Play doesn't really work with swimming (even though that can be a team sport with competitive relay races) or pole-vaulting or triathlon. But I need to mention swimming so that any follow-up questions are about something I can speak about. I'm a swimmer; I know nothing about football.
Is it possible to answer a question "Do you play...?" with an answer about swimming or athletics?
That is at least a concrete question, although the answer is probably a simple "No". Arguably, it's still possible to analyse the question as being really "What is the purpose of this question and what is the examiner expecting me to say?" but I believe that's off-topic, because it's a question about the exam itself and not the principles of the English in the answer.
However, because the question is about a learner's English exam, it may fall into the fairly broad category of "Other practical problems you encounter or face while learning English" (my emphasis) which is on-topic on ELL.
An answer to the question suggesting something like
"Do you play any sports?"
→ "I'm a competitive swimmer."
→ "I'm a world-class marathon runner."
would be Not An Answer. Even though those replies are perfectly reasonable in normal conversation, steering the topic from sport in general to the particular, they do not fit the criteria they need to. I suppose it might be possible to suggest
"Do you play any sports?"
→ "I don't play any team sports, but I'm a competitive swimmer."
but then we need to know whether that would satisfy the syllabus and the expected answer. I don't believe we're collectively qualified to answer that; and even if it were possible the answer might be wrong with next year's syllabus.
A question such as I suggest in my third paragraph above is likely to be objectively answerable, and the answer is unlikely to change much over time. I think we can answer those questions.