How to prepare for this interview

Hello guys, I've been invited for a software developer trainer role interview at modcom. It's in 4 days. The languages mentioned there are html, css, framework was bootstrap and android java/Kotlin. I've been told it's physical and I'll be assessed so I should come prepared.

Help me to prepare for this interview. What topics should I go through before the interview. It's in around 3 days. I'll also have to travel for around 8 hours.