It's possibly more than trivia. I expect a candidate to be able to have a conversation about whatever language they know best and have used the most. They shoul

It's possibly more than trivia. I expect a candidate to be able to have a conversation about whatever language they know best and have used the most. They should be able to speak about that language's strengths and limitations and mitigation strategies. If a candidate couldn't talk about languages they claimed to use, that would be a huge red flag for me. If the interviewer is just throwing out questions about keywords and language implementation that are irrelevant to the candidate and the position, that counts as trivia. It's hard to say from the quote whether or not it was a trivial question.