Indian Administrative Services Examination conducted by Union Public Service Commission in three phases:

Phase 1: Preliminary Examination or CSAT (Objective Section)

Phase 2: Main Examination (Subjective Section)

Phase 3: Interview (Vocal Section)

Eligibility:-

Students must hold a degree in any stream from a recognized University .

Applicants appearing for their final year degree exam are also eligible to apply for IAS

Applicants have passed final year of MBBS exam but are yet to complete internship can apply for the prelim exam.

Applicants must have attained the age of 21 years and must not have attained the age of 32 years.

5 years Age Relaxation if a candidate belongs to a Scheduled Caste or a Scheduled Tribe.

3 years Age Relaxation in the case of Applicants belonging to Other Backward Classes who are eligible to avail of reservation applicable to such Applicants

Exam syllabus :
Phase 1: Preliminary Examination – CSAT Syllabus:

Syllabus for Paper 1:
Indian Polity and Governance-Constitution
Economic and Social Development
General Issues (Environmental Ecology, Bio-Diversity, Climate change etcs.)
General Science
Current events (National and International)
History of India
Geography of the world (Physical, Social, Economic)

Syllabus for Paper 2:
Interpersonal Skills
Comprehension
Logical Reasoning and Analytical Ability
Decision making and problem solving
General mental ability
Basic Numeracy
Data Interpretation
Comprehension Skill (English)

Phase 2: Main Examination Syllabus (1750 Marks):

It consists of 9 papers, in which two are qualifying papers of 300 marks each:

I. Any Indian Language

II. English

These two papers just need to qualify which is mandatory

III. Essay

IV. General Studies 1 (Indian Heritage/Culture, World History & Geography)

V. General Studies 2 (Governance, Constitution, Polity, Social Justice and International Relations)

VI. General Studies 3 (Technology, Economic Development, Bio-Diversity, Environment, Security & Disaster Management)
General Studies 4 (Ethics, Integrity & Aptitude)
Optional 1 (Of your choice)

VII. Optional 2 (Of your choice)

These are the optional subjects from which you can choose your preference:
Indian History
Law
Management
Mathematics
Mechanical Engineering
Medical Science
Agriculture
Animal Husbandry and Veterinary Science
Botany
Chemistry
Civil Engineering
Commerce
Economics
Electrical Engineering
Geography
Geology
Philosophy
Physics
Political Science
Psychology
Public Administration
Sociology
Statistics
Zoology
Anthropology

Hindi
Kannada
Assamese
Bengali
Chinese
English
French
German
Gujarati Kashmiri
Konkani
Malayalam
Manipuri
Marathi
Nepali
Oriya
Punjabi
Russian
Sanskrit
Sindhi
Tamil
Telugu
Urdu

Students can opt literature as optional one if one had not done degree in that.

Phase 3: Interview and Personality Test