I've read that they do two questions per interview in several places and was wondering if it was true. I'm asking because I've had two phone interviews as part of the summer SWE internship process and I answered only one question on both. I was pretty thorough on both questions, explaining a brute force, optimizing, testing my code, and talking about complexity, but am worried that they were easy questions meant to take 10-15 minutes before going onto the "real" question. Can anyone shed some light on this concern? Thank you!