First of all the question arises on the authenticity of the interviewer. How can we find the true biography of an author through an interview? What is the source to counter check?
For accuracy and authenticity, a lot many things need to be taken into consideration when we are going for a biography. May be literary interview is one among them.
Before going for any biography, it is important to go through a lot of studies on different biographies. This helps to get into the shape we intend to do. Muhammad Farooq
True biographies are next to impossible as each articulation/representation is but a reading of either oneself in relation to others or others' perception of the subject.
What can be conceptualised is how one sees oneself. Any interview is therefore but an archive of "ways of seeing".