Keep calm and get selected
Is there any who've appeared for any sort of interview but his or her heart didn't beat faster? I don't think there is any. If you go for an interview, you'll be sweating, your heart will beat faster as you'll be nervous. Almost all of the people in the earth have this problem.
But there are some of them who can control their nervousness. They can express they are not nervous although they are nervous. Here are some tips that can really help you to be calm during an interview.
Make the preparation well:
Do some research about the organization where you'll be sitting for the interview. It will release some pressure off you as the more you know the more your confidence level rises. Most of the scholars and experienced people have agreed on this that the best way to stay calm in an interview is to be prepared.
Make a plan:
To make a plan about what to do on the day of the interview. Make the route plan, make the papers ready, and iron your clothes. Do all of these on the day before the interview. Because, the less you have to think on the interview day, the more chance for you to be confident enough.
Practice:
Before appearing in the final interview, rehearse well. Practice the manners that should be followed during the interview. Perhaps you can make a script of what words you'll use to describe yourself.
Arrive early on the site:
Arrive at the interview site at least half an hour before the reporting time. It will give you a chance to relax and to be familiar with the environment of the office.
Be Confident:
Thinking positively and being confident is the prerequisite for appearing in the interview. Be confident. Answer each of the questions confidently. If you don't know the answer, then don't get feared. Say no with confidence.
The tips shared above have worked for me. I just shared my personal experience about facing an interview well. Try to follow them. They'll be good for you too as they were for me.