I'm surprised that these are commonly asked and I'm guessing these aren't for a position building web apps. Most of these are distant memories from a CS degree

I'm surprised that these are commonly asked and I'm guessing these aren't for a position building web apps. Most of these are distant memories from a CS degree and rarely used concepts in the word of y-combinator startups where Ruby and Python are common. I think people building web apps look more for developers who write maintainable code, design good user interfaces, write good tests, make cross browser solutions, etc. These would be nice to have but too low level for everyday use at most startups.