Corpay Process Improvement Analyst interview questions

I applied online for this position via LINKEDIN. After few days I had a mail from the HR to send my resume & a friend request to add him on LINKEDIN. I sent my resume & then was set an interview time. On the day of interview I was said that the interview needed to be moved to another date as he was busy. On the rescheduled interview date the HR called seemed very irate about something as the call started of. He asked me many questions on six sigma which I answererd, the call went for about 30 minutes. Its a pity that the HR who interviewed me was a person who knew nothing, the way he handled the call I knew I wouldn't get the job. Anyways after a week he mailed me that he is pursuing other candidates & the job position is still vacant. :)