Case study round was interesting- there was a lot of extra information to confuse you but at the end it is basics you have to focus on. Technical and HR round was not too difficult.
I applied through university. I interviewed at ZS Associates (Pune) in Sept 2022
Interview
1 aptitude test followed by 2 rounds of interviews - one being case round and another an FIT round. You can google ZS case studies, they are pretty standard whereas they'll ask guestimates based on your resume.
Interview questions [1]
Question 1
guesstimates (based on your resume), puzzles (can check GFG for the puzzles)