I had the same doubt as specified here (which is why I haven't accepted any answers yet).
Reading it told me that both kinds of questions are accepted:
- Catalog question - Users attempt to find the shortest code in every language. No answer is accepted.
- Shortest code question - Users attempt to find the shortest code possible in any one language of their choice (often a golfing language). The answer that solves the task with the shortest code (irrespective of language used) wins and answer is accepted. Bounty may also be awarded.
Given that I have no personal opinion on the issue, which kinds of questions are more suited for which kind of challenge?
Detailed answer categorising various kinds of questions would be helpful.