There were total 3 rounds. 2 technical rounds asking about basic OOPs in C++, general data structures and singleton design pattern. Last round was HR round, it was just a formality. All interviewers were friendly and process was smooth. They orally conveyed that I was selected and asked to share salary, identity documents but did not share final offer as they got immediate joiner. I was disappointed but later I understood company's situation, no hard feelings now