Nuance Software Engineer interview questions

Wasted Three hours there - did not spend more than 2 seconds with HR rep - met with three managers. They did not call back even to say - 'sorry we aren't interested' . Never had an interview where no feedback was provided.. Perhaps they sensed I wasn't interested in job (not my cup of tea there) but this is so unprofessional not to even acknowledge with rejection email, nothing...

I got a mail from the HR with a list of questions concerning my knowledge and one of their products. I replied to him with my response and then after 3 days I got a email from HR for a phone conversation (ASAP). I called his number but no response and so dropped him an email with my availability. Suddenly on a Monday the HR called me stating that y responses and my qualifications matched and asked me for my availability for a technical Interview. He asked for the same day and I managed the timings. In the evening the Project Dev Mgr called me and is telling me that he believes my experience is not enough and he wants a more experienced candidate for this job and so he does not want to waste my or his time in taking the interview. Apologized and hang up. I don't mind rejection but I guess they need to clear their own thoughts about their requirements rather then making calls and confusing candidates.