I think 4 rounds, 1st technical , 2nd company standard ethics related MCQ, 3rd technical again with good deep interview questions on your stronger skills, any of the skills you mention in your intro interview was ready with questions and interviewer in third round was very good at technology some VP guy

Interview processes are very slow and complex. Whenever you apply to some role they take months to consider or to take application to next stage, and many times job opening goes on freeze, so I think these openings are just for show and are a facade for their shareholders. Also even though company have 90 days notice period, they dont entertain candidates having such lengthy notices.