The UPSC defines 'merit' as a composite of various assessments and attributes, including academic performance, aptitude, and interview outcomes. The selection process emphasizes equitable assessment, ensuring that candidates are evaluated based on their knowledge, critical thinking, and suitability for civil services roles. Merit is not solely determined by test scores; instead, it encompasses a holistic view of a candidate's potential to contribute to the nation. Thus, candidates are encouraged to present their genuine selves, demonstrating qualities such as leadership, integrity, and problem-solving skills throughout the selection process.