Clearpath Technology interview questions

They conducted two rounds of the interview and prior to that there was a test to check the communication and analytical skills, easy interview process majorly focus on communication skills, presentability, and qualifications.

I was told its a scheduled interview on Feb 13th 2016 but it turned out to be walkin with various platforms, android, testing, dot net, NC etc. After waiting for 4 hours, they called me for my turn and that interviewer asked basic questions and finished the interview in 5 mins. After repeatedly trying to reach the HR, they kept saying they did not get feedback and finally they reply yesterday I am rejected....without valid reason.