You do only phone ones or you take time to go do the interviews? Also, if you just interview and then don't keep practicing, aren't you gonna get rusty?

I've had quite a few so far...definitely more than 10. From my experience, coding problems can range from anything to anything. Wall street was more puzzly, but even the big4 sometimes ask very convoluted questions.

Not sure how to generalize everything but to solve random problems on Leetcode.