Just because I learned this stuff 15 years ago doesn't mean I wouldn't need to relearn it exactly as I did back then. Surprise, I never needed to manually bala

Just because I learned this stuff 15 years ago doesn't mean I wouldn't need to relearn it exactly as I did back then. Surprise, I never needed to manually balance a binary tree for work, and mostly people don't. So I don't see how "it's easy and free to (re)learn" says anything when hardly any software developer who didn't just graduate a year ago remembers this stuff by heart. Also I'd like to think I know enough about most data structures to recognize where they make sense and to get into implementing using them quickly. But quickly doesn't mean "all of them" or "during the interview" or even "preparing everything in the utmost detail as they would ask without reference material". Teachers also don't explain complicated stuff without preparation, unless it's the material they do every year for many years.