To prepare for ethical dilemma questions in the UPSC interview, aspirants should dive deeply into ethical theories and frameworks, such as utilitarianism and deontology. Engaging with contemporary ethical issues, particularly those relevant to governance and public administration, will improve their understanding. Role-playing various scenarios can help candidates articulate their thought processes clearly. Aspirants should also reflect on personal values and experiences that shape their ethical viewpoints. Practicing interview techniques with peers or mentors enhances confidence and prepares candidates to handle unexpected questions gracefully.