Certification questions have been deemed off-topic since before beta. In my mind, there is little difference between certification and homework questions, and they should be off topic whether they are multiple choice or not.
Personally, homework questions are a bit worse to me as I am not here to do some college student's homework for them. Getting an answer here will not help the student in gaining understanding of the concepts, nor help them if a similar question comes up on a test. Further, it may be considered cheating depending on the school's policies and/or the stance of the instructor.
If someone doesn't understand the concepts behind the homework question, or the homework question causes them to wonder about other aspects of the topic, then asking specific questions about the concept/topic may very well fit in here, but not the homework question itself.