Being cool during an interview is all about presenting yourself confidently and professionally. Here are some tips to help you maintain your cool during an interview:

1. Preparation is key: Research the company and the role you are interviewing for. This will help you feel more confident and prepared.

2. Dress the part: Make sure you dress appropriately for the interview. Choose an outfit that is professional and makes you feel confident.

3. Practice your responses: Prepare answers to common interview questions and practice them beforehand. This will help you feel more at ease during the interview.

4. Body language: Maintain good posture, make eye contact, and offer a firm handshake. This will show that you are confident and professional.

5. Stay calm: Take deep breaths and try to relax before the interview. Remember that the interviewer is also trying to get to know you and assess your suitability for the role.

6. Be yourself: Authenticity is key. Be honest and genuine in your responses. Trying to be someone you're not will only make you more nervous.

7. Show enthusiasm: Demonstrate your interest in the role and the company. This will show the interviewer that you are excited about the opportunity.

8. Ask questions: Prepare some questions to ask the interviewer. This shows that you are engaged and interested in the role.

Remember, it's normal to feel nervous during an interview, but by following these tips and staying true to yourself, you can present yourself in a cool and confident manner.