Thales .NET Software Engineer interview questions

first interview with some basic bq questions, the hr was super nice and we had really good chat. second interview is talking with the manager, they will ask your something that you have in your resume as well as the role related technique questions. third interview was a take home coding assignment. I thought i just need to solve the problems and submit, but ending up not aligned with their scoring points, such as using design pattern, algorithm optimization.