Cognizant Programmer Analyst Trainee interview questions

It was a campus drive.first round was an aptitude test(very simple).i cleared it without any difficulty.next day i was called for my tech interview and this was totally bad.before going in,i asked the volunteer(from amcat) how the interviewer was..he said,she has been rejecting most of the candidates..i didnt lose my confidence and went in..greeted her and answered almost 80% of her questions,,what i didnt mention was my project on which she looked a bit confused..after that she asked me to ask any questions and i asked her to tellme where i need improvement to which she replied that"i cant tell you that right now but by the end of the day u will know" i came out after wishing her...after 2 mins the amcat guy came to me and said "REJECTED" I was shocked but i kept my cool and went straight away to my home..sometimes its luck that is not on your side.