Amazon Web Services Professional Services Intern interview questions

It was on-campus. Three rounds: 1. Initial Screening (Non Technical Aptitude and Behavioral based) 2. Two interview rounds (one project based, one CS fundamentals + questions on Amazon's Leadership Principles) I have no idea how to initial screening works. But what I can guess is that they are looking for a specific kind of personality that shows some of their leadership principles. And, in the personal interview rounds, the interviewers were quite friendly.