It's been the same experience for me. I've been successful as a developer and yet have never encountered many of these problems that interviews in the past dema

It's been the same experience for me. I've been successful as a developer and yet have never encountered many of these problems that interviews in the past demanded I know. Ultimately if I end up encountering a problem like that in my career, the honest answer is to pick up a book or begin reading through articles on solutions. Sadly that kind of answer seems to be frowned upon because it's better for you to lie about what you know than to admit you don't know the solution and figure out ways to rectify it.