PayPal Software Engineer interview questions

Applied via career fair at school. Got called in for a on campus interview. The person interviewing me didn't care for much about my resume and we jumped right into a whiteboard coding question. He wasn't the friendliest and seemed condescending. Treated me like a senior student even though I was just a freshman, and wanted the most efficient code possible for questions.

This was the first Round in which I was given the link to the Coding challenge on Hackerrank. There were 2 questions to be solved in one hour. Both could be solved by basic logic and knowledge of arrays.