That is where we interviewed as an industry 10 years ago. Then people noticed a few holes (what, they don't know fundamental $x!?) and those were filled. List vs map, complexity, tests, trees and traversal, http api stuffs, unixy things, and then into networking fundamentals, distributed systems stuff, etc.

10 years ago, nearly no candidate pulled a distributed queue solution in a design interview and now it is a standard answer in their pocket.