NDA. There was a very easy Excel problem. I chose to code instead. The interviewers are very junior and had difficulty explaining the questions as ESL persons. They also very passively participating in the interviews. They did not ask any question to assess the depth and breadth of ML/statistics knowledge. Mainly bc they're juniors themselves. So the hiring decision is pretty random.
Sigiloso
There's quite an extended back and forth in actual interviews for questions like this, so nothing quite like real practice. The Prepfully Square Data Scientist experts have actually worked in this role, so they're able to do an honest-to-God accurate mock, which really puts you through the paces. prepfully.com/practice-interviews