Students preparing for the interview round of UPSC should focus on holistic preparation to demonstrate their complete persona. This includes a thorough understanding of their DAF (Detailed Application Form) and the ability to articulate experiences and beliefs confidently. Candidates are advised to stay updated on current affairs and national issues, as these often form the basis of questions. Engaging in mock interviews can simulate the experience and help reduce anxiety. Additionally, candidates should work on their body language, communication skills, and ability to think critically under pressure, as these attributes are evaluated during the interview.