STMicroelectronics Software Engineer interview questions

I did not receive any feedback after two interviews. Even if I didn't get the job, the minimum to do is to give feedback. I may not be suitable for the position, but the least they can do is say so and briefly explain why

The interview was on call, it continued for 1 hour .. In a conference call different questions have been asked .. some of the questions were very tough and some of them were average.