The mention of salary, before the company brings it up, is a reflection that your interests are pretty surfaced and not very in-depth. They want people who are excited about the job. Hiring is not about money. The fact is money can only motivate people so much. They want people who are motivated and really like to do that kind of work, not because they like the money.
Money is a limited motivator.
Knowing the questions you will ask is important. Spisak believes that anticipating questions that will be asked of you, and thus preparing your answers to these, is also crucial. I recommend knowing how you will respond to questions, and preparing professional portfolio of your experience. While it can be difficult to be comfortable talking about yourself in a formal situation, Cook believes it is vital in an interview to highlight all of your positive points with every opportunity. Interviewing is, culturally, somewhat of an adjustment.