Object Technology Solutions Lead Software Engineer interview questions

I have 10 yrs of experience. I went to company on time. They made me wait for almost 10 mins. Then HR came shook my hand and took my resume. Again waited for 15 mins. A guy came took me to a discussion room and started the interview process. The problem is, the guy is 5 yrs experienced. (How I know?.. read his tag and searched in google). He is more nervous than me. Even though I told him the right answers, he keeps repeating the question saying why.. why.. He asked me questions about wpf grid but he doesnt know what type of grids are available in wpf and what are different ways to populate them. He has no clue what is MVVM (wpf and mvvm are my primary) and kept asking me how.. how.. He kept on asking me about web technologies though I keep telling him i only worked on them at the beginning of my career. I understood that he is asking what he know. HR didnt even bother to send me off, the same interviewer came back and told me that they will call back and we all know whats that mean. Im not a genius but i know what i have in my resume. I have seen much worse interviews than this. I wasted half day for this.