They were all behavioural interviews, so no particular questions asked on a topic. It was all what I worked in past and how it can be improved now after all these Manu years of experience. So if you have really worked hard on any project for long term (mainly java and cloud project) interviewers are sharp enough to dig in further and get exactly what they want and if you are suitable for their requirement. Just be honest with you and them and that's it.