Candidates can build confidence for the UPSC exam through consistent preparation, self-assessment, and positive reinforcement. Regularly revising subjects and practicing mock tests can help identify strengths and weaknesses, allowing targeted improvements. Engaging in group discussions and study partnerships fosters a supportive environment where candidates can share knowledge and overcome doubts together. Visualization techniques can also instill confidence by mentally preparing candidates for success. Lastly, ensuring adequate rest and maintaining a healthy lifestyle bolster both mental and physical readiness for the exam.