The weightage of the interview in the overall UPSC examination is significant, as it accounts for 275 marks out of a total of 2025 marks. Though it may seem like a smaller segment of the overall process, the interview plays a pivotal role in assessing candidates' personality traits, communication skills, and suitability for civil service roles. The interview evaluates a candidate's confidence, presence of mind, and ability to articulate thoughts, making it crucial for final selection among candidates who have achieved similar scores in written examinations.