To add more context. The task included interfacing with a 3rd party API that was poorly documented. In order to even see what a response looked like would have been incredibly hard without a debugger. Dumping it to the console would have been many pages of nested JSON. So sitting there twiddling, trying to make sense of an API doc that didn't provide a clear description of the results rather than just run the thing and see what it did was the wrong way to go.

A debugger is as much "help" to an engineer as a hammer is to a carpenter. In my experience, engineers who don't use one are a detriment to the entire engineering organization wasting time and money.

Anyway, yeah I dodged a bullet on that but it's such a pain in the ass that I went though a two month interview process only to be vetoed at the end like that. During that time I spent about two weeks to learn an esoteric API that I'll never use again. Oh and it would have been highly unlikely that I would have even used that API in the job. It was just a requirement that I learned it for this particular interview. ...and no I'm not going to commit it to memory just so I can pass a coding interview and if that was the expectation then this whole situation is even more ridiculous.