Hello,

UPSC exam is conducted in three phases namely Preliminary, Mains and Interview.

To provide you a brief about this exam, there are two papers in Preliminary,each of 200 marks and its marks are not added in the final list.

in GS Paper-I you need to score the required cut-off against your category which consists of the following topic such as History of India and Indian national movement, Indian and World geography, Economic and social development- sustainable development, poverty,inclusion demographics, social sector initiatives etc,Indian polity and governance-constitution,political system,Current Events nationally and Internationally, General Science,General Issues on environmental ecology,biodiversity and climate change.

CSAT includes topics such as basic numeracy, comprehension, logical reasoning and analytical ability, general mental ability, decision making and problem solving, interpersonal skills including communication skills. The qualifying marks is 33%.

Mains is more of a subjective type, one needs to write answer for Four General Studies Paper as mentioned below;

• GS-I includes Indian Heritage and Culture,History and Geography of the World and Society,
• GS-II includes Governance, Constitution, Polity, Social Justice and International Relations,
• GS-III includes Technology, Economic Development, Bio-Diversity, Environment, Security and Disaster Management,
• GS-IV includes Ethics, Integrity, and Aptitude,
• Two Optionals, One Essay, Two language paper,

There are total nine papers here. 250 marks for each paper, total is 1750 marks followed by Personality Test of 275 marks.

Hii Dharmaraj!
UPSC is an exam which contains of syllabus having subjects from all the streams of education. To start with, you should prepare for subjects like, History, geography, political science, economics, Science, technology, English, environment, ecology, Mathematics, general knowledge, current affairs etc.,
Hope this helps.
Good luck!