All theortical questions and concepts were asked from HTML, CSS and JS. The overall process was good, but I expected more DS and algo questions. This is just 1 round done

A day Before Interview : HR told you have selected for next round . Please brush up javascript basics. Interview: Interviewer was the founder . He told asked some html css question. No JS question asked. I told him I did'nt brush up my basics on css . Still he insisting in asking css question. After that he told he told he will give a programming exercise . And you know what he gave in programming question , make a triangle using html and css. Html and css does'nt comes under programming question, these are not even programming language and the great interviewer doesnt know that and claiming it to be programming exercise. Still I successfully designed the triangle. Hey founder , go and brush up your basics what programming languages mean. Other words : Interviewer was immature and does'nt know how to take interview.