To me there are two core issues reflected in your question. Fundamentally your manager does not understand programming, and fundamentally they do not respect yo

To me there are two core issues reflected in your question. Fundamentally your manager does not understand programming, and fundamentally they do not respect your judgement in hiring or how to hire. Most good programmers are going to use Google to check on relevant information for their problem, even if it's related to a language or area they are relatively familiar with. That just because of the nature of technical problems, software and Google. So not pinning your hiring on detailed recall of specifics in an interview without allowing Google is just reasonable.