Yes, these are some of the biggest mistakes that someone can make during an interview. I have had a couple job interviews in my life. Thankfully, they both have been very informal and the interviewer was very easy to talk too. I was very nervous before I got to the interview, but my nerves quickly calmed and the interview went quite well. To be well prepared for an interview people should make sure they know some information about the job they are interviewing for. They should also come prepared and be on time, those are two main things that can help a interview go well.