I am not c++ developer myself, so can't help on the namespacing decision, although a quick search on a project made by google, it seems they don't although I as

I am not c++ developer myself, so can't help on the namespacing decision, although a quick search on a project made by google, it seems they don't although I assume it will change from team/company to team/company who might have their own guide styles: https://github.com/google/flutter-desktop-embedding/search?q=std%3A%3A&unscoped_q=std%3A%3A https://github.com/google/flutter-desktop-embedding/search?q... having said that, the question here is not who is right but the unprofessional behaviour shown by the interviewer. I'd suggest to write to the company's HR or even to one of their c level managers and tell them about this situation. I think it's hasn't been the first time and that even this toxic behaviour is not a surprise within his coworkers.