Two rounds. First one is HR screening, second one is conversation with Hiring Manager. I was given an Excel file before second round and was asked to finished a report using Rstudio and PowerBI. The questions in the report are simple and straightforward. Magic thing happened then. I received the offer letter from HR, but then they found that I am on student visa, so they just rescinded my offer even though I have already told them I accepted the offer. Great interview experience but unprofessional HR.