1. Generally speaking, when you first go in for an interview, you may not know who you are facing, so after you go in, if the interviewer is alone, call "Hello!" During the interview, the interviewer will introduce himself, so at the end of the interview, you can call the other person "surname+position", such as manager Chen, thank you and say goodbye. If there are several interviewers, call them "Hello teachers!" At the end of the interview, if there are only two or three interviewers, and you remember their information, just call them "surname+position" as before to express your gratitude and say goodbye. If there are many people, it is better to call them "teachers" directly, without saying hello one by one.
2. If you know the interviewer's last name before the interview, if he is a man, you can call him "Miss Li", for example. If the interviewer is a lady, please don't use "miss" or "lady". If you know the specific position of the interviewer, such as human resources manager, you can call the interviewer "Manager Wang". If the other person's position is not high, for example, don't call him "Assistant Yang".