1)INTRODUCE YOURSELF WELL
It shows your ability to meet new people confidently. Also, the first impression is the last. Keeping eye contact as you introduce yourself is another good practice, it shows you’re engaged in the conversation and capable of communicating well. Also, if the introduction goes well you will feel more confident and the person sitting in front of you gets a good impression.
2)WRITE CLEAN CODE
Make sure your code is precise and modular instead of being a lengthy one. You are supposed to deliver this part quickly. Your code should be easily understandable to the interviewer.
Long pauses during an interview can make the interviewer think twice before choosing you as maybe he thinks that you can’t make your point clear or express yourself clearly. If you communicate well he will be able to give you more hints and direct you to the solution. If the interviewer offers a hint then make sure you incorporate them in your approach.
You should feel comfortable asking or cross-questioning a question. Always remember that the interviewer's goal is to get a good signal for you. Asking questions will make them think that you are engaged and devoted to the place they are offering.