Preparing for the interview stage of the UPSC exam requires candidates to cultivate communication skills, confidence, and a well-rounded knowledge base. Aspirants should simulate interview conditions through mock interviews and practice responding to common questions. Engaging in debates and discussions helps in refining articulation. It's also essential to brush up on current affairs and personal information, as interviewers often explore these areas. Building a calm and composed demeanor is vital, as it reflects the ability to handle pressure effectively.