I have finished Meta onsite round. For me it was Product Architecture and I was really worried about how to prepare for that. I searched every community site and posted the question on multiple forum. I never got the answer. I hought of just posting here to be the helpfull for others.

I just focused on System design preparations and go for the onsite interview. For me it was not any difference between Product Architecture v/s System Design. Interviewers are usualy very nice and they guide us to the right directions what they are expecting.

Just a suggestion: Dont get confused. Start preparing for System Design. Something is always better than Nothing.

If you like this post just upvote to reach more and more people.