HR got my profile from talent community portal from one of my previous applications. There were three rounds, 1st technical round involved basic C++ topics like diamond inheritance, access specifiers and so on. 2nd technical round was a deep dive into embedded world and involved timers, GPIO, UART and so on. Final round was 30 mins managerial round which was just a vibe check. Manager talked and all about next steps and gave false hopes, HR never called back after that round.