Some of the most frequently asked interview questions in UPSC interviews revolve around the aspirant's background, motivations for choosing civil services, their understanding of current affairs, and ethical dilemmas. Candidates might be queried about their opinion on national issues, and responses to hypothetical scenarios can gauge critical thinking. Questions about hobbies, interest in public administration, or reasoning behind chosen optional subjects can also arise, emphasizing the need for candidates to have a well-rounded profile.