Citi Senior Software Engineer interview questions

I was being interviewed for position of SSAS 2005 developer. I got this contingent offer from one company who already had many of their consultants placed with the client. The whole interview lasted for around 20 minutes. The interviewer asked few questions about my past experience and was generally pleased. He asked me about semi-additive measures and named queries in particular. I explained it correctly. I thought interview went pretty well but I did not get the offer. I believe he had already made his mind before interviewing me because I don't recall any question that I couldn't answer correctly. I too didn't press the middle company as the job was a long commute.