Overall, the process was very fast, and all the interviewers were very nice.

It took 3 weeks to finish all the interviews, including Christmas and New Year holidays.

I had:

• 1 phone screen
• 2 coding interviews
• 1 system design interview
• 1 research interview (for PhD)

All the coding questions were common ones you could easily find when reading "Cracking the Coding Interview" or browsing GeeksforGeeks.com, and there were no brainteasers.

The system design problem was kind of hard because there are no right or wrong answers. I don't think I performed that well in this round, as I lack experience in large system design.

The research interview mainly focused on my research project, and we also had a small coding portion, which I did well on.

Honestly, I am surprised I did not get an offer from Facebook; maybe there were some requirements I did not meet.

Overall, Facebook's interview questions are interesting and not hard. All the interviewers are knowledgeable and nice to talk to.