Intuit interview questions

Very rude and arrogant people. Panel enters the room, completely ignores you and argues with the HR coordinator for some confusions. No basic courtesy to either say hi to the interviewer or have the discussion outside with HR. It seems they had decided before coming to the room only and interview was just a formality to reject one. I told once, i dont have detailed practical knowledge on machine failure, synchronization and clustering. Concepts i am fully aware of, implementation details i dont know. Still same question was round about asked, first when I discribed the project. And then when you ask to code LRU cache, stick to it. What is the purpose of again asking how is machine failure handled with in-memory cache, like the LRU cache program written. Plain serialization to a text file is not fine, they want synchronization between systems and what to see code for that all within 30 minutes coding round. Are they expecting me to write the source code for memcache or redis when the question was just LRU cache implementation. Only good part was the HR,who was quite nice and cooperative all the time.