What does UPSC stand for and what does it do?

UPSC stands for Union Public Service Commission, India's central recruiting agency for Group A and Group B civil services. It conducts the Civil Services Examination (CSE) to recruit IAS, IPS, IFS, and 20+ other all-India services. Established under Article 315 of the Constitution, UPSC also advises the government on matters relating to civil service appointments and promotions.

What is the difference between IAS and IPS?

IAS (Indian Administrative Service) and IPS (Indian Police Service) are both All India Services recruited through UPSC CSE, but serve different functions. IAS officers manage administration, policy formulation, and district governance. IPS officers lead police forces, intelligence agencies, and paramilitary organizations. IAS rank is typically higher in the merit list; both are prestigious services with distinct career trajectories.

What is the UPSC Optional Subject and how should I choose one?

The UPSC Optional Subject is a pair of papers (250 marks each) in the Mains examination where candidates choose one subject from 48 options. Popular choices include History, Geography, Public Administration, Sociology, and Political Science. Choose based on: your educational background, scoring potential in previous years, availability of study material, and genuine interest. The optional contributes 500 of 1750 Mains marks.

UPSC Glossary — Key Terms & Definitions

A quick-reference glossary of 20 essential UPSC Civil Services terms — from exam stages and paper names to training institutions and service cadres.

Cadre: The state or union territory allocated to an IAS/IPS officer for service. Cadre allocation is based on rank, preference, and vacancy.
CSAT: Civil Services Aptitude Test — Paper II of the Preliminary Examination. It is qualifying in nature with a 33% minimum cutoff and tests comprehension, logical reasoning, and decision-making.
Current Affairs: Recent national and international events relevant to the UPSC syllabus. Current affairs form a significant portion of both Prelims and Mains questions.
Cut-off: The minimum marks required to qualify each stage of the UPSC Civil Services Examination. Cut-offs vary by category and year.
DAF: Detailed Application Form — a comprehensive form filled by candidates after qualifying Prelims, before the Mains examination. It captures service preferences, hobbies, and personal details used during the Interview.
DoPT: Department of Personnel and Training — the central government department that oversees recruitment, training, and career management of civil servants in India.
Dossier: A confidential file maintained for each civil servant containing their complete service record, performance appraisals, and disciplinary history.
Foundation Course: A joint training programme at LBSNAA for newly recruited IAS, IPS, IFS, and other All India Services officers. It covers administration, law, public policy, and team-building.
GS (General Studies): General Studies — the core Mains papers (GS Paper I through IV) covering history, geography, polity, governance, economy, environment, science, ethics, and international relations.
IAS: Indian Administrative Service — the most sought-after All India Service. IAS officers serve as District Magistrates, Secretaries, and heads of key government departments.
IFS: Indian Foreign Service — the civil service responsible for managing India's diplomatic missions, foreign policy, and consular services abroad.
Interview / Personality Test: The final stage of the UPSC selection process, carrying 275 marks. A board assesses the candidate's intellectual qualities, social traits, leadership, and suitability for a career in public service.
IPS: Indian Police Service — an All India Service responsible for internal security, law enforcement, and police administration at the state and central levels.
LBSNAA: Lal Bahadur Shastri National Academy of Administration — the premier training institute for IAS officers located in Mussoorie, Uttarakhand. It conducts the Foundation Course and professional training programmes.
Mains: The Main Examination — the second stage of the UPSC Civil Services Examination. It comprises 9 written papers (including 4 GS papers, 1 Essay, 2 Optional Subject papers, and 2 qualifying language papers) with a total of 1750 marks.
Marks Normalisation: A statistical process used by UPSC to standardise scores across different Optional subjects so that candidates choosing different subjects are compared fairly.
Optional Subject: One subject chosen by the candidate for Mains Papers VI and VII (250 marks each, 500 total). There are 48 optional subjects including Literature, Sciences, and Humanities.
Order of Preference: The ranked list of civil services (IAS, IPS, IFS, IRS, etc.) that a candidate fills in the DAF indicating their preferred order of service allocation.
Prelims: The Preliminary Examination — the first stage of the UPSC Civil Services Examination. It consists of two objective-type (MCQ) papers: General Studies Paper I (200 marks) and CSAT Paper II (qualifying). Only Paper I marks count for merit.
Static GK: Static General Knowledge — factual, non-changing knowledge covering history, geography, Indian polity, economics, science, and art & culture that forms the backbone of UPSC preparation.

Want to dive deeper into the UPSC exam structure?

Explore full UPSC Syllabus

UPSC Glossary — Key Terms & Definitions

A quick-reference glossary of 20 essential UPSC Civil Services terms — from exam stages and paper names to training institutions and service cadres.

Cadre: The state or union territory allocated to an IAS/IPS officer for service. Cadre allocation is based on rank, preference, and vacancy.
CSAT: Civil Services Aptitude Test — Paper II of the Preliminary Examination. It is qualifying in nature with a 33% minimum cutoff and tests comprehension, logical reasoning, and decision-making.
Current Affairs: Recent national and international events relevant to the UPSC syllabus. Current affairs form a significant portion of both Prelims and Mains questions.
Cut-off: The minimum marks required to qualify each stage of the UPSC Civil Services Examination. Cut-offs vary by category and year.
DAF: Detailed Application Form — a comprehensive form filled by candidates after qualifying Prelims, before the Mains examination. It captures service preferences, hobbies, and personal details used during the Interview.
DoPT: Department of Personnel and Training — the central government department that oversees recruitment, training, and career management of civil servants in India.
Dossier: A confidential file maintained for each civil servant containing their complete service record, performance appraisals, and disciplinary history.
Foundation Course: A joint training programme at LBSNAA for newly recruited IAS, IPS, IFS, and other All India Services officers. It covers administration, law, public policy, and team-building.
GS (General Studies): General Studies — the core Mains papers (GS Paper I through IV) covering history, geography, polity, governance, economy, environment, science, ethics, and international relations.
IAS: Indian Administrative Service — the most sought-after All India Service. IAS officers serve as District Magistrates, Secretaries, and heads of key government departments.
IFS: Indian Foreign Service — the civil service responsible for managing India's diplomatic missions, foreign policy, and consular services abroad.
Interview / Personality Test: The final stage of the UPSC selection process, carrying 275 marks. A board assesses the candidate's intellectual qualities, social traits, leadership, and suitability for a career in public service.
IPS: Indian Police Service — an All India Service responsible for internal security, law enforcement, and police administration at the state and central levels.
LBSNAA: Lal Bahadur Shastri National Academy of Administration — the premier training institute for IAS officers located in Mussoorie, Uttarakhand. It conducts the Foundation Course and professional training programmes.
Mains: The Main Examination — the second stage of the UPSC Civil Services Examination. It comprises 9 written papers (including 4 GS papers, 1 Essay, 2 Optional Subject papers, and 2 qualifying language papers) with a total of 1750 marks.
Marks Normalisation: A statistical process used by UPSC to standardise scores across different Optional subjects so that candidates choosing different subjects are compared fairly.
Optional Subject: One subject chosen by the candidate for Mains Papers VI and VII (250 marks each, 500 total). There are 48 optional subjects including Literature, Sciences, and Humanities.
Order of Preference: The ranked list of civil services (IAS, IPS, IFS, IRS, etc.) that a candidate fills in the DAF indicating their preferred order of service allocation.
Prelims: The Preliminary Examination — the first stage of the UPSC Civil Services Examination. It consists of two objective-type (MCQ) papers: General Studies Paper I (200 marks) and CSAT Paper II (qualifying). Only Paper I marks count for merit.
Static GK: Static General Knowledge — factual, non-changing knowledge covering history, geography, Indian polity, economics, science, and art & culture that forms the backbone of UPSC preparation.

Want to dive deeper into the UPSC exam structure?

Explore full UPSC Syllabus