"Believe half of what you see, and none of what you hear" - a quote that really applies here. I've seen quite a lot of developers who are good at talking, and being critical to show knowledge - but usually it's a psychological cover for feeling insecure. This is why some developers brag about knowing obscure things, for example. Anyways, my point is - that if you haven't used it in 13 years, it doesn't matter anyways - don't feel insecure. In addition, many of those coding questions are usually created by 'inexperienced developers' who don't know how to gauge talent, so they put together 'obscure, factual' questions.