Plintron Global Technology Solutions Dot Net NET Developer interview questions

I got the call from HR and asked about my experience in .net and current employment.. My profile was shortlisted from naukri (but i cant remember that I've applied to Plintron through naukri or HR mail) . I am asked when I was available for the Face to Face discussion and I Fixed the next day . The mail printout is required to enter DLF IT Park where my interview held. Actually I went to venue 2 hrs late(12:30 pm is scheduled). I gave my CV to a person and in a few seconds a young man had come. He asked why I want the move, asked about my percentages and when i finishewhatd 10th and 12th. I vaguely explained something about my first project. Then he left and I was waiting in reception again. Again the same person had come and asked me to write code to swap variables without third varia ble. Then he asked what is the last project I did. I explained various thing about my works inall projects. Not going too technical. Then he said "ok we'll call you in few days if you shortlisted". I asked whether there is any other round or not. He said No and told the same thing above. I dont know why this happened. May be I am not fullfilling their criteria even before the interview. So they play this Drama may be. I am waiting for their feedback