I skipped them because from what I read on blind / my experience with the first few interviews they didn't really come up in data engineering interviews + I have a hard time understanding them. I am still doing Leetcode every day and have added them into the mix because I do think they are important, I just wanted to optimize for the questions I felt would be most likely in an interview.
I knew I really understood a question when 1) I could think of a way to solve it that was different than the solution I learned 2) I would bookmark the question and come back to it a few days later, If I could solve it without looking at the answers I felt good about moving forward.
I didn’t make it past the manager screen so basically I just talked to recruiter and manager about projects I was working on / skills. I was interviewing for a data eng manager and they said they ended up hiring internally