First phone call consists of mainly Meet & greet. I was asked general question about my educational experience and work experience. Then the interviewer explained a bit about the job position and its responsibilities. After a week they scheduled for three technical rounds

Good. Technical details were discussed clearly, together with my past projects and relevant domain knowledge. The interview was well structured and focused, with questions that allowed me to present my experience, technical background, and problem-solving approach in a coherent way.