During the UPSC interview process, personality traits are assessed through various methods, including behavioral questions and situational scenarios. Interviewers observe candidates' responses to gauge qualities such as confidence, adaptability, and communication skills. Traits like emotional intelligence, resilience, and integrity are also crucial and can indicate a candidate's potential as a civil servant. The interview aims to evaluate not just knowledge but the holistic personality of the aspirant to ensure they embody the values and ethics necessary for public service. Thus, personality assessment becomes integral to determining suitability for civil services.