Candidates should present arguments logically during the UPSC interview by structuring their response clearly. Starting with a concise thesis statement, followed by structured reasoning, enables effective communication of ideas. Supporting claims with relevant examples and evidence strengthens their arguments, while maintaining an awareness of counterarguments demonstrates critical thinking. Engaging calmly with the interviewer, maintaining eye contact, and displaying confidence are equally important, as they reflect poise under pressure, essential for a future public administrator.