The weightage of different subjects in the UPSC preliminary examination varies, with subjects like General Studies holding significant importance across various papers. Generally, the preliminary examination includes subjects like Indian Polity, Geography, History, Environment, and Current Affairs. Each subject is designed to assess a candidate's overall awareness and analytical abilities. The allocation of marks varies from year to year, influenced by the UPSC's strategic objectives. Therefore, candidates should focus on a comprehensive understanding of all subjects to maximize their performance, as differential weightage can change with different exam cycles.