Dolphin Technology interview questions

Applied online, Direct got onsite interview but didn't pay for the travel expense. Two rounds of interview. One for memory group and one for IO group. For the memory group, they asked a lot about the sense amplifier, Static Time Analysis. For the IO group, the guy just give me a sheet of questions and half an hour to finish. Then he went back to work till I finished. Questions are the same with others and not so hard.

I submitted application and got on-site interview directly, then they arranged my interview on one afternoon, but they don't cover the travel expense, so I booked the flight by myself. One day before the interview, they emailed me and informed me the position is taken, so my interview is canceled, although I already arrived at San Jose at that time for interview. They don't care my cost on flight ticket at all so that I lost $500, two days and an interview opportunity. I don't what to say about it, if you decide to choose one candidate among applicants, you should at least interview all the applicants that got interview opportunity. It concerns with the reputation of the company!