In total there were 5 rounds 3 Tech +HM and HR rounds:
1st round was on DS, you need to be really good in your coding approach. Interviewer looks on approach rather then just giving final solution. Prepare well on Array, string and collection related problems (Leetcode and Geeks)
2nd round was a Automation round: Implement Backend framework for the given APIs. How to handle Test Data and Parallel execution. Code modularity and reusable functions.
3rd round was functional round where you need talk about previous projects and challenges you faced. Provide high level scenarios functional and non-functional.