Aspirants can build confidence for their UPSC interviews by engaging in comprehensive preparation and practice. Mock interviews with peers or mentors offer a platform to experience the interview environment, enhancing comfort with the process. Simulating questions likely to be asked allows candidates to articulate their thoughts clearly and coherently. Additionally, staying updated on current affairs and personal achievements fosters a sense of preparedness. Practicing stress-reducing techniques, such as deep breathing or visualization, also aids in managing nerves and boosting overall self-assurance.