Interviewers assess a candidate's understanding of their role as a future public servant during UPSC interviews by posing questions about ethical dilemmas, governance principles, and the responsibilities of public servants. Candidates are expected to demonstrate knowledge of administrative processes, public policies, and the impact of their decisions on society. They may also evaluate the candidate's awareness of current issues and their ability to apply theoretical knowledge in practical scenarios. Strong communication skills, empathy, and a commitment to public service are vital traits that interviewers look for, as they reflect a candidate's suitability for the role.