I have an interview on friday except I have never had an in person interview for this field. I had an interview with an electrical company before in person but after hearing the job description I had to turn them down. Besides that I have only ever had phone calls and Skype interviews. I have been told I can skip around subjects but overall am very great to talk with. I just graduated so I am new to all this.
The best thing is to take it as it is and be calm. You won't be any better than you are, but you need to trust yourself that you are good enough. If you are not calm, you could not show your full potential. In order to avoid such a scenario, you need to build your confidence, even if it is in artificial ways. If you have the time, watch this: https://www.youtube.com/watch?v=O6sE0tMcVwg . Whatever happens, be aware that you will learn from the experience and it will make you better.
Another thing is that no one can tell you "Be calm" and you can actually do it. Usually, this has the opposite effect. In order to do that, you need to hack yourself, in a way. You can do it by focusing on your breath and having a constant flow of air in, pause, out, pause. For this, watch this vid. You may also want the second part. It really helps. https://www.youtube.com/watch?v=q06YIWCR2Js
If it involves a technical interview, rest assured that it won't be anything cryptic. Analyse the question thoroughly, plot a mental workflow about the inputs and expected outputs. If you think of an answer that makes sense say it out loud, no matter how ridiculous it may sound. The interviewer will almost always appreciate it when you demonstrate your thought process - speak all your thoughts out. He/she might in turn correct or guide you if you're drifting away. The simpler you make your solution, the easier your interview will proceed.
Jan Vladimir Mostert
Idea Incubator
Several stage performers use a pillow, put their face in it and scream in the pillow to release anxiety. Before an interview, visualise the pillow, and breath out hard as if you're silent screaming. Once the anxiety is gone, you can be natural and you'll be able to respond more naturally to difficult questions.
Also be honest, interviewers experienced in a certain field can very quickly detect of you're busy bullsh!ting them and once you do that, the interview is a lost cause. Rather be honest and say you haven't worked with something, but you have read a b c about it and would love to work with it rather than pretending you've worked with it.
Enthusiasm is important - if you're not excited about the company and what they do, they'll be less excited about you as well - that obviously means you have to read up on the company as well, understand their values, know about their products and have questions about all aspects of the company, not just about the role you're applying for.