Ensure to review the job posting several times before an interview to familiarize yourself with the qualifications required for a role.
Should advanced degrees be required, the interviewer will assume you are aware of these requirements and that you will be willing to pursue advanced degrees, if required (should there be no master's degrees already listed on your resume). This applies even in the event you only have a bachelor's degree and the position requires a master's degree, yet you were nevertheless granted an interview.
Answer this question by pointing out you are serious about the position you applied for and as such, should you pursue a master's degree as per the position requirements, your education will not interfere with your new position. Employers are looking for seriousness and commitment.