Essential qualities for civil servants, according to **UPSC**, include **integrity**, **leadership**, **communication skills**, and a strong commitment to public welfare. They must be adaptable, possess critical thinking abilities, and demonstrate an understanding of diverse socio-economic issues. Additionally, resilience and the ability to work under pressure are essential traits. UPSC evaluates these qualities through various stages, particularly in **interviews**, where candidates are assessed on their morals and aptitude for serving society effectively.