I practice a lot before any interview. Literally, I spend week rehearsing the answers and go all out in the interview. What I found is the interviewer really does not care about how you deliver it if you delivered the ‘right’ answer. Try to focus more on giving the best answer and prepare. In interview day, don’t hold yourself back, go all out. Just aim at answering the question even if you need to force every words. That worked for me. There is a lot difference in how we stutters perceive stuttering and how others perceive it.