The subjects typically included in the UPSC Main Examination encompass a range of areas vital for civil services. These include Essay, General Studies papers (I-IV covering history, geography, society, governance, and ecology), and optional subjects reflecting the candidate's expertise. Additionally, there is a Language paper and an Indian Language paper that also contribute to the assessment. Candidates should select subjects they are comfortable with, ensuring a comprehensive grasp of concepts, as depth of knowledge is crucial for success in the examination.