Meta Onsite System Design Questions

Hi all,

I was compiling system design questions for meta onsites. 2 onsite Coding rounds at meta are quite similar to phone screen and they are mostly from leetcode Facebook tagged. Behavioral is again some standard LP qustions. I couldn't find a compilation of system design questions in past 1 Year. Hence creating the list here. Would need your support, please contribute as you find some.

1. Ad click aggregation system
2. Top 10 songs played on spotify (top-k problem)
3. Design web crawler
4. Deisgn online chess
5. Design whatsapp
6. Design price alert system similar to camelcamelcamel.com
7. Design proximity server.

Update: Adding problems asked in last 1 year only i.e. 2023, as they are most likely to be asked again.