Integral Ad Science interview questions

Had the first initial interview with the talent director. He was experienced, straight forward, and on point. I thought I didn't do too well at first but my honesty got me pass the initial phone interview. I went on for in-person interviews and to meet with other client services managers. I first talked to the supervisor. She asked me to talk about myself and what I did. At times I was blankly staring towards her holding my resume, and noticed she started to cover up my resume and thought I was looking at it for reference. The other interviewers were about the same, asked me what I did in the past and my experiences, while the last interviewer was a bit more sarcastic. Most of them were in their mid to late 20s except the talent director. I think the overall interview was ok. I think I should've explained more on the technical details of my experiences, and perhaps avoid staring at my resume blankly while talking, with the supervisor, for any misunderstandings. The environment seemed nice, with an open office and young professional colleagues. My referral, who I've worked with described it as a great place to work. I was a bit sadden that it didn't work out as expected, but it was an experience for me as I've been doing work overseas for so long, thus perhaps need to get reacquainted with the cultural differences. I personally like to be interviewed by older folks who has been around. But the ad tech industry is full of young professionals now, which could be a good thing!