Siemens Digital Industries Software interview questions

Only one interview, with my to-be supervisor. It was quick (scheduled a couple days in advance) and I had a response 2 days after the interview. The interviewer called me without advance notice to ask a few questions, then scheduled an in person, 1-on-1 interview in the next two days. The interview was 30 minutes long and vaguely technical. I was asked some general questions about C++ concepts, but I did not do any whiteboarding questions. A few questions about leadership experiences and the like as well.

It was a technical interview of about 2 hours. There were two people. One was already there and one joined later. It started with asking me for the rating of my concepts. He asked me to rate myself out of 10 in oop, dsa, algo, database and os. Then he asked my interests in detail like why do I like android development or not like web development. Then he asked me to write a function for finding factorial.