Inter-disciplinary studies significantly impact UPSC preparation, as they promote a holistic understanding of subjects. This approach fosters connections between diverse fields, enabling candidates to draw from various knowledge areas during examinations. For instance, a candidate well-versed in both economics and environmental science can better analyze issues like sustainable development. Moreover, interdisciplinary learning enhances critical thinking and problem-solving skills, essential for effective governance and policy-making, reflecting the real-world complexities civil servants face.