I am not audit, I don't know what technical questions they will ask you. But usually 1 or 2 staff will take you out for lunch. It is time for them to show you the firm is a friendly working environment. and it is time to show them that you will get along with them well. Read some local news papers, so you can talk about sports, movies, etc. with them. If someone is graduated from same school, you guys can talk about class, professors, etc. It is also a good time to ask questions, like CPA exam r
Don't worry, people from mclean office are super nice~ :D I wish I knew who you will be interviewing with so that I can give you some targeted tip. I agree with xiaomi722, on site interview should be a safenet as long as you don't behave crazy~ :D Best wishes to you!