After clearing the interview there was no call from Hiring manager, they kept postponing the discussion and I finally let go of it. Joined a better company. There were 2 virtual rounds, first round was purely programming in C, it was easy though. Second round was bit of domain and programming. They mainly tested the domain knowledge.

first they have kept written test including aptitude and to develop 16 bit microprocessor and technical questions on c plus plus and c programs on largest no and second largest number. that's it