Effective public speaking in the UPSC interview requires key skills such as clarity, confidence, and articulation. Candidates should practice organizing their thoughts logically, ensuring coherent flow in their responses. Active listening is critical for understanding questions fully and responding appropriately. Additionally, body language conveys enthusiasm and engages the panel. The ability to think on one's feet and handle unexpected questions is also important. Mastering these skills can significantly influence a candidate's performance during interviews, reflecting their capability as future civil servants.