Interview Experience Required

Hi Guys, I am attending an interview process for Lead Data Science. I want to know the previous experiences with to improvise my interview experience. The company having 5 rounds and each round is an elimination (the scary part).

First round is DSA and Data Science fundamental. Where I have learnt DSA 5years ago and now I’m out of practice. For Data Science it might be more like ML (I assume).

Second round is System Design, which will be more on designing system and scalability

Third round is more off Technical And Managerial around.

4th round is managerial round

5th round is HR discussion

I want to know where to prepare for all the rounds and what’s the efficient way to prepare for it.