The interview process involves one phone interview and one onsite interview.

The process is relatively quick because I contacted HR directly.

The interviewer and HR were very nice, which made me feel relaxed.

I had the onsite interview at the Facebook New York office. The working environment there is amazing, and I believe any software engineer who enjoys their work would love it.

No very difficult questions. Just take it easy and enjoy the process. Almost all of the questions are from "Cracking the Coding Interview". A quick response and an emphasis on efficiency are important.

I think Facebook loves to ask questions about tree structures and some practical questions because they are realistic problems. When you prepare and practice, remember that efficiency is a really significant issue, much more important than simply giving an answer.

I would also like to recommend another book: "Programming Pearls". The book may not be a hard one to read, but the author's thought process, his reasons for improving algorithms, and how he solves problems are really fantastic. The questions are from realistic problems, and the book is really worth reading several times. It benefited me a lot.