As justizin said, if you don't know something, say so. Don't lie, stay calm and remember that the questions that they are asking are related to the job that the

As justizin said, if you don't know something, say so. Don't lie, stay calm and remember that the questions that they are asking are related to the job that they need to get done, so put that on your mind. Also think about the questions you want to ask them. They want to see how much interested you are in the position as well. Nevertheless, you'll get better as you go to more interviews. So, no worries, just study the company business and what the role needs.