What if you were fired for misconduct how do you answer that?

It depends on the grounds of your terf your dismissal. If you think the company had solid ground for firing you, well admit it to the interviewer. But don't forget to tell him/her that you've learned from your mistake and you'll improve to the fullest. Bear in mind that interviewers are trained and they can read your mind. If you want to get the job, always be honest to your answers. But if the reasons of your dismissal was unjustifiable, don't hesitate to tell the interviewer everything. Regardless of negative comments about your ex-company.