We seem to be having a large number of questions lately on Trailhead superbadges (a new one just came out), as well as on certification exam preparation.
Our Help Center draws a pretty clear line on Trailhead questions:
Trailhead: Questions asking for assistance with finding resources to answer specific Trailhead Questions or for help resolving issues with Trailhead DE Orgs are welcome. Questions asking for a direct answer to a Trailhead Question are not acceptable and will be deleted.
Trailhead is intended to demonstrate your capabilities on an independent basis. As a Community SF.SE wants to demonstrate its support for the purity of that cause by not interfering with your personal learning experience.
I read this as a strengthened commitment to the usual question standards - that is, show your research, ask a detailed, specific question, and don't seek to have others do your work for you.
The injunction to locate resources, I think, is a helpful one, as distinguished from sharing solutions to Trailhead validations, which have limited general value to the community as technical knowledge.
I don't believe we have similar language shown for exam-related questions, but I'd advocate for applying an even more stringent version of the same standards. I don't think it's healthy for our community to support users posting exam questions and asking to be led through them, have their answers confirmed, or have explanations of mislead answers provided. One representative example is this question.
These types of questions don't tend to produce technical answers or referrals to resources, but tend more to be focused on interpretation of the question text itself. Additionally, since we are not in a position to distinguish between real exam questions and mock questions, I think we blur lines when we allow this content to be posted.
Am I being too stringent here? How hard a line should we draw on these types of questions?