Basically, any test that involves binary trees (sorry - "btree" is a somewhat different thing).
Realistically, most programmers never see another binary tree, after they leave school.
It's a "youth-pass filter." People right out of college will ace them. Us oldsters are less likely to do as well (unless we cram for them). In forty years of programming, I never encountered a single one, in the wild, and a lot of our image processing algorithms involved a decent amount of data crawling, so they had some relation to binary trees (shows why they teach them), but the way they were handled was much different.
Basically, any test that involves binary trees (sorry - "btree" is a somewhat different thing).
Realistically, most programmers never see another binary tree, after they leave school.
It's a "youth-pass filter." People right out of college will ace them. Us oldsters are less likely to do as well (unless we cram for them). In forty years of programming, I never encountered a single one, in the wild, and a lot of our image processing algorithms involved a decent amount of data crawling, so they had some relation to binary trees (shows why they teach them), but the way they were handled was much different.