Meta Software Developer interview questions

The interview is held through Skype. Start with the fundamental knowledge test about data structure. One hour interview. Offered one problem, I started with my first general idea and then explain to the interviewee. Then interviewee asked for the analysis of time complexity and then a better solution.

Recruiter called, explained process for 30 minutes. Recruiter was friendly and helpful. They email you all the algorithms preparation sites. I guess they expect you to go through all the sites and complete all the algos and then come for interview. Next he scheduled telephonic interview, Interviewer was not friendly at all, He started with Introduction and Why Facebook. Then coding question. He was not helping or giving clue at all, i could hear keyboard noises, i think he gave me question and start doing his work. I completed question in half hour. he asked complexity. I am sure i did good as i was able to write code and explained through examples, but next i heard from recruiter that i was not selected and they can't provide feedback due to company policy. Process seems good but not providing feedback is something i didn't expect.