I had a phone screening set up via email. I never received the first scheduled call so I sent an email to follow up. The person messed up. It happens and so we rescheduled the following week.During this phone screening, I couldn't help but to feel as if I was wasting the interviewer's time. She asked questions which I answered and she would then repeat the question verbatim right after I answered. I'm used to having interviewers ask more probing questions if my answer is too broad. If she wanted clarification it could have been nice for her to ask for that instead of having a rough tone with me. I could tell she was frustrated. The questions were pretty open ended, so I tried to respond by answering the question and also including product knowledge I had from my online research. It seemed she wanted to dig deeper into my product knowledge to the point where it was nearly impossible to answer without having ever used it before. It was a phone screening and I didn't even have a chance to screen them back, I think it was mostly the tone even though she was the one who missed the first screening. I didn't get an apology for that either. At the end of the call I even asked why she called for the screening. I felt like both of our 1/2 hours were wasted. I almost would have preferred the email rejection.