HCLTech Senior Software Developer (.NET) interview questions

Was given a whiteboard-style interview by someone who seemed more interested in proving to me that he knew something I did not. Because I couldn't solve his non-realistic, non-world puzzle in a timely fashion I was deemed unqualified, but somehow still acceptable for the project if the client agreed. The interview was held in the company office in Redmond in a fairly casual setting. I seemed overdressed in a shirt and tie even compared with people who were considered management.

three rounds are there (2 technical,1 hr) they assemble you, one by one they call for face to face interview. very good process interview also easy to crack, do basic things clear and mostly asks on oops, C#, .net basics