Since agile transformation takes a long time and relevant skills in an organization, the answer to this question is by mentioning the period for how long a person is working with this methodology and what made him start working with the agile process.
Achieving a stable transformation from other software development methodologies require much focus. Therefore, for such interview question, a person needs to mention the correct number of years of him working with agile. He also needs to mention his success story of the transformation. Mentioning his relationship with other team members and supervisors, managers, and officers is also important.