Proxymity Software Engineer Java Developer interview questions

After a telephone conversation with HR, they sent me a link to a 1.5-hour technical interview via Teams. HR did not answer me if I need to prepare for coding. The interview began as usual with a description of the position and questions about my experience. Then there was a part of questions on Java: types, threads, templates, etc. In the last 20 minutes they asked me to open my framework and share the screen with them. Something went wrong - I wasn't able to share screen in Teams. We had to switch to zoom and lost time. The guys started to get very nervous. They sent me a file with a task: the text of the task and several classes, including test ones, where I needed to write methods. In fact, the problem was simple to encode, but quite complex described - 2 numbers as 2 linked lists of numbers in reverse order, which need to be summed up and also obtained as a list in reverse order. I didn't have time to do this, and the interview was stopped. When I calmed down after the interview, I completed the task in 15 minutes. Perhaps they did this on purpose to see if I could work under pressure.