[rodorgas]

Not only he didn’t imagine candidates would Google interview questions, but he also didn’t sit and watch they write code. It’s not an interview, it's a take home assignment, but in-person.

You get very few signals just looking at the finished result. You should let the candidate ask you questions and progressively improve the solution. And you should progressively make the task more complex, because it’s not a binary evaluation. A good code interview must rank candidates.

[djur]

A lot of other people have flagged the remarks about "yelling in chat" and the like, and those are certainly red flags, but I think what you're pointing out here is the biggest problem. "Write code on paper" and "write code unattended" are not the two only available options. Worse, from the description of it as "a very simple change", it kind of sounds like he was giving them the same type of problem to solve in both cases.