Core competencies expected from candidates in the UPSC interview include strong communication skills, analytical thinking, and sound judgment. Interviewers assess candidates' ability to articulate thoughts clearly, demonstrate awareness of national issues, and showcase critical understanding of various subjects. Interpersonal skills, confidence, adaptability, and ethical reasoning are also evaluated. Overall, the interview aims to gauge a candidate’s personality and suitability for a career in public service, requiring aspirants to prepare holistically, addressing both knowledge and personal attributes.