For the second year in a row, Apple CEO Tim Cook will be the featured interviewee on the opening night of the AllThingsD D11 conference, being held in San Francisco on May 28-30. Last year's interview with Cook, at the D10 conference, was his first formal interview at a third-party event not closed to investors. The opening-night spot is highly coveted and usually reserved for an extensive conversation. In his previous one-hour talk, Cook answered pointed questions on the patent system, Apple's legal fights and his relationship with former CEO Steve Jobs.