I had total of 3 interviews. First was quite easy one with base sas questions(merge concepts, footnotes, PDV) and puzzles ( 4 men to cross a bridge with 1 lamp, 2 can cross at a time. 1 takes 1 min, 2nd 2 mins, 3rd 5 mins, 4th 10 mins, Find min time to cross the bridge by all of them). Few questions regarding UHG.. Second round had few case studies, basic questions about analytics, puzzle(2 candles, each takes 30 min to burn. how will measure 45 mins), few sas questions. some sas functions like scan, substring, etc. Retain. difference between interleaving and merging. Third round was the final round with some general questions like best 3 moments in last 1 year, and 3 worst. long term ambitions..why UHG. few sas questions. Overall was a great experience. just stick to basics and do as many puzzles as possible. SAS fundamentals but main topics are merging, functions, PDV, must remember syntax if asked..also try to analyse if a case study is given..jst try out. Best of luck to everyone (Y)