A mandatory degree for candidates applying for the UPSC Civil Services Examination is a bachelor's degree from a recognized university. This degree can be in any discipline, allowing a broad spectrum of educational backgrounds among applicants. The requirement ensures that all candidates possess a minimum level of knowledge and critical thinking skills necessary for effectively navigating the extensive syllabus and responsibilities of civil services. The inclusivity of this educational criterion encourages diverse participation, enriching the civil services with varied perspectives and expertise.