Had two phone interviews and then an on-site interview day. The two phone interviews were a combination of design scenarios (ie. "If you were the product manager at Facebook for a new product in the x industry", where x is an industry that isn't known to be social) and personality type questions (ie. "Tell me about impact in your career."). The on-site interview varied from understanding the health of a web application (using metrics), situational questions (ie. "How would you determine how many new users we should expect to get tomorrow?" "If an important metric drops by 50% of expected value, what would you do?"), wire-framing a new product for mobile, questions about the future of social.
There were technical questions, but no algorithm questions, coding, or distributed system level design questions which was surprising given the nature of building/designing large scale web and mobile applications.