In a marketing interview I was asked, "If things were going bad, how would you bring up morale?". First I really dislike when questions are asked with zero context. Usually when I ask for more background they say "make it up yourself".
With marketing/sales I realize sometimes the job is to promote a product that most people don't want. I have learned to accept that as part of the job and don't let it affect me (for this and various other reasons I prefer remuneration that is a flat rate and not commission based). What I have seen before is when I'm working with a team and some of the team members start talking about how the product sucks and we're never going to be able to sell any, I would try to distance myself from those being negative.
In short, I have no clue how to answer such a question. I wasn't able to find much on Google either.