Siemens Mobility Software Developer interview questions

I have quite a bit of experience all around. The interviewer was quite rude and said his impression was that I was missing a foundation and it was hard to get. The guy seemed overall annoyed and like he hated his job. Gave me a basic but old styled project. A web app that worked like a photo slider. I also learned AWS and deployed and hosted the web app over the weekend to submit it. No response from the interviewer.

First round was Online Assessment in which moderate level questions were asked. Second was face to face technical interview in which questions were based on stacks, strings and priority queues. Then finally HR Interview.