Teaching is not an easy job. One question you might be asked is "What would you do if a student told you to f**k off?" I wouldn't ignore it, but at the same time, I am mindful that students might swear to get a reaction out of me. But like most adults in my country (United Kingdom), I hear swearing far too often to be offended by it. I would calmly ask the student "Is there any reason as to why you feel a need to use that type of language?"