I said no, and I still got the job. If you do say no, they will pose you a hypothetical situation anyway - e.g. how would you deal with it if you reached mid-week and it didn't look as if you would meet your weekly kpis?
This is an important one. Make sure you ask thoughtful questions which show you have initiative and are eager to work hard and learn. What ongoing opportunities are there for training? What makes an ideal "role name here"