AMD Software Engineer interview questions

1- Call with HR 2- 45min Hiring Manager Round 3- 5 onsite interview with diff people of team all technical( round1- Open source interview, gave a repo and asked me how would you navigate it, Round 2- Basic Leetcode round simple hashmap question and discussion on exp,, Round3 Asked me to design a system/ api which can work on any platform like windows, linux, mac without changing each time related to specification, round 4- debugging and explain the working of code (hardest of all)