The UPSC assesses a candidate’s aptitude through various components, including the preliminary exam's objective questions and the subjective nature of the mains. Evaluation criteria focus on a range of skills, such as comprehension, analytical abilities, and decision-making capacity. The interview adds an additional layer, assessing interpersonal and communication skills. Importantly, the holistic approach of assessing knowledge across topics ensures that candidates demonstrate a well-rounded understanding crucial for civil services.