Tree question. Couldn't give tips at all. Interviewer was disconnected and condescending for ea reject in 45 minutes.
Really terrible candidate experience. There have been few good experience with meta
I applied online. The process took 2 months. I interviewed at Meta (Zürich)
Interview
there was 5 rounds of interview. The first round was HR. The second round had a technical round with the architecture questions. The next round was involving a coding interview with detailed C++ 17 and C++ 20 features.
Two rounds one coding interview for the first and then two more, system design, and behavioral for the second. All medium to easy leet code questions. Good experience would do again.