The weightage of the interview in the final ranking of UPSC candidates is around 275 marks, which constitutes a significant portion of their overall assessment. After the Mains examination results are declared, the interview, or Personality Test, becomes crucial in determining the final merit list. This stage assesses candidates on their personality qualities, including communication skills, decision-making abilities, and overall suitability for a career in civil services. Thus, the interview plays a pivotal role in differentiating candidates with similar scores, influencing their final rankings and postings.