Zscaler Senior Android Developer interview questions

It was a Technical / client interview. This guy showed up 10 min late. His connection was terrible, but he said it was definitely my connection (I was in and out of calls all day, including the very same call with a recruiter, and my connection was just fine). I didn't want to confront him, so I just spoke very slowly and clearly so he could understand me. The guy, was REALLY impolite. He asked me to share my screen, because he wanted me to put everything in writing, but he could not see it due to his connection issues. Then he insisted he NEEDED me to do things quickly. He then sent me a Google Doc and asked me to describe step by step how to do certificate pinning in Android. It is a really simple task, you basically download a certificate and add to the APK, then you add a public key in your code, and that's pretty much it, but he wanted more steps (which both me and the Android SDK documentation don't know how to do). Then he asked me to start up Android Studio and do some very simple code. Two fragments and do the communication between them. While I was doing it, he clearly switched tabs from the interview and has gone on with his own life. From time to time, he would switch back and change the instructions. Then he just assumed from the top of his head I was having issues with the code, and asked me what challenge I was facing. I was just building whatever he told me to build last, no issues, but he kept insisting on it. 5 min from the end, he interrupted my coding assignment, and he asked if I had questions for him. I had 3 questions: “What is it that your company do?”, “What software development process do you use” and “What's the tech stack?”. He answered each of them with a single word and then said “Thanks for your time” and left.