Well below I have given you the syllabus and the paper 1st pattern for the CSAT exam conducted by the UPSC so you can have a look

CSAT Syllabus

CSAT (Civil Services Aptitude Test) has two papers:

General Studies
General Ability Test

CSAT General Studies Paper 1 Syllabus

CSAT Paper I: 200 Marks; Duration: Two Hours; Number of Questions: 100

Current Affairs: Events of national and international importance
History of India and Indian National Movement
Indian and World Geography: Physical, Social, Economic Geography of India and the World.
Indian Polity and Governance: Constitution, Political System, Panchayati Raj, Public Policy, Rights Issues, etc.
Economic and Social Development: Sustainable Development, Poverty, Inclusion, Demographics, Social Sector Initiatives, etc.
General issues on Environmental Ecology, Bio-diversity and Climate Change (no subject specialization required)
General Science

CSAT Paper-1 Analysis

Topic 2011 2012 2013 2014

History and Culture 13 20 15 21

Economy 18 12 18 6

Polity 17 25 18 13

Geography 11 11 14 15

Environment & Bio-diversity 22 23 22 21

Science & Technology 19 9 13 17

Current Affairs 7

Total 100 100 100 100