PayPal Data Scientist interview questions

Asked me some questions of statistics, probability, some puzzles, And Programming in jupyter Notebook. some concepts Of object oriented Programming. And Machine learning, Guesstimate, hypothesis testing, etc And some basic questions about my graduation project.

Recently had a chance to attend the interview for Data Scientist position. Initial process of communicating and scheduling interview was good. But interview wasn’t. Interviewer looked tired. Despite giving right answers, was rejected. Advice- please don’t waste time of candidates if you guys are not interested to select