PayPal Fraud Analyst interview questions

I applied on their website and received a call from HR two or three days later and scheduled a phone interview the next morning. The interview question include how to detect hack for a paypal account and what kind of fraud paypal may face, from the seller side and from the buyer side. Also, I was asked if a customer creates a new paypal account, how to decide the information he provide is real when the customer only gives an email address.