Meta Software Engineer interview questions

Got contacted via LinkedIn. Had a chat with the recruiter, a very friendly lady, who asked about my background and about 8-10 simple programming questions at the end. Scheduled a phone interview with an engineer, who was also quite polite and helpful. After asking about my background, he gave me two questions. It wasn't my area of expertise (algorithms) so I did just okay, nothing superstar. Two days later I was told that there aren't any positions fit for me at present but they'd like to stay in touch.

I interviewed with them during the campus career fair. Initially had 2 rounds of interview on our campus, and then we were flown in for the onsite interview. The onsite interview took almost an entire day. We took a tour of facebook's office and then had around 3 1:1 interviews.