Do you mean would fail? I’m not sure how to answer this question, because there wouldn’t be anything to do if you knew you wouldn’t fail other than to just keep believing in yourself.
No, because I don’t think about failing. I always try my best to think positive with whatever I do.
Good for you!:)

It means is there anythig in particular you would go for if you knew you wouldn’t fail. Is there something you haven’t done because of the fear of failure.