Earlier quoted context omitted.
Since all programming jobs deal with trees and recursion, and if you are already at Google working on another team, wouldn't it mean you already know about those (since our assumption being all jobs deal with those)? Why not just check directly if you were actually useful instead?
It's 100% not true that all programming jobs deal with trees. I worked for years on a major audio/video/screensharing communications SaaS product and never once needed to write recursive code or use a tree structure. Not all code is for processing data. There was tons of code that had very little to do with data structures or algorithms, and much more to do with implementing network protocols, business logic, managin…
I don't agree that all jobs have to deal with trees either.