Decisive Analytics Corporation interview questions

I applied through consultancy . I interviewed at Decisive Analytics Corporation (Bangalore,J.P nagar). In interview process I answer correctly All question, But They are not selected ,i am shocked,totally waste of time,i think they simply time pass ....

They were quick to respond in the beginning, but after 2 interviews they completely stopped replying. They said they would get back to me, but did not respond to multiple follow up emails.