If you read this review, you should not take mine as a typical one, for I'm new in software. TripAdvisor sent senior engineer to interview, however questions are basic. The first one is related with hash table, "what data structure do you use to store (or look up) telephone numbers?", and then topic was related to conflict handling (usually we use chaining one). Then at the real-time coding test, I was asked to dealing with the duplicate spaces among words, and the output should be only one space among word (or non between word and delimiter). I think I messed up when using pointer (I use C++), but I still think it is a basic one. One more thing, if you choose C++, it should not be different from C when dealing with a short question.