Varian Medical Systems Software Engineer C# interview questions

Zoom remote interview from recruiter, asking basic questions and my experiences. Then a remote interview after a week with techinical leader. Talk about my projects using c#. Next week a remote meeting with 5-6 people using zoom. Introduce one of my project in details, including the coding, using pattern. And a coding test ( they give me 2 tasks and I write code on txt). One task is about basic concept of c# like inherit. Another task is to write an algorithm to check the correctness of a function. The tested function is to remove all odd numbers in a array.