Galaxy Weblinks PHP Developer interview questions

First HR called me and schedule the interview. When interview started they told me to turn on my camera but they are not doing the same even they hide their names by setting galexy 1 and galexy 2. They were asking such basic questions and when I gave answer they started laughing and saying are you sure? It is wrong. Dude I am working from 5 years and you are saying wrong for the basics things. Such a unprofessional and informal way of communication. They just wanted to show candidate down.