What is the best approach in a physical interview and how you will deal with it?

What I think and have done is that :

Going to an physical interview, its a "poker"time, be happy because you are going to enhance your life and the interviewer also has "poker" time, as he is also looking for good candidate, so when good things are going on, we should happy to interact, giving explanations of our expertise if asked.

So when you will be happy to face a interview you shall do it perfectly, do not fear to accept if you do not know anything, because ready to learn is far better instead of doing wrong.

That's it, simple yet having all professionalism.

Be yourself non other.

We must be happy and polite, try to be good listener as well as speaker.