Facebook loves graph theory and tree questions. Study up on these for sure. I feel like my questions were of average difficulty, not hard by any means. Some of the other interviewees I talked to received recycled questions that I've seen on this site and on careercup.
No very difficult questions. Just take it easy and enjoy the process. Almost all of the question are from the <Cracking the Coding Interview>. A quick response and emphasize on the issue of efficiency are important. I think Facebook love to ask questions about the tree structure and some practical questions because they are realistic problems. When you prepare and practice, do remember that efficiency is a really significant issue, much more important than simply giving an answer. And I would like recommend another book <Programming pearls>. Maybe the book is not a hard one to read, but the thought of the author, why the author wants to improve some algorithm and how he solves problems are really fantastic. The questions are from realistic problems and the book is really worth reading several times. It benefits me a lot.
Give an example of a divide and conquer algorithm.
Write a function that can figure out if two words are anagrams of each other.
Square root of x
Explain technical challenges you encounter recently (School projects, work projects, etc) Coding question about matching objects. (Can't tell due to NDA)
1) Longest substring in a Palindrome string . 2) Binary Search
Check if a string is symmetric or not.
No technical question. The company does not seem to look for technical positions but just those who can work well overall.
Design a computer.
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