Optional / subject-specific papers
The optional subject is the single largest block in the OCS Main written examination: two papers of 250 marks each, 500 marks in all, against 500 for the two GS papers and 250 for the Essay. You choose one subject from the Commission's notified list - History, Political Science, Public Administration, Geography, Economics, Sociology, Law, Mathematics, Botany, Zoology, Commerce and Accountancy, Management, Odia literature and others - and write both papers at honours depth.
How the papers are set
- Paper I and Paper II each carry 250 marks and three hours; the syllabus broadly follows the honours-level syllabus of the subject.
- Questions test conceptual command, not trivia: definitions, debates, schools of thought, applications, diagrams and, where relevant, case law or data.
- The same optional subject must be taken in both papers; substitution after the application is not allowed.
Worked example
Political Science Paper II: 'Examine the discretionary powers of the Governor in Indian federalism.' Reasoning: begin with Articles 153–162 and 200; classify discretion (reservation of Bills, government formation, reporting under Article 356); cite the Sarkaria and Punchhi Commission views; use one recent controversy; conclude that discretion is exceptional and judicially reviewable. Marks lie in the classification and the commission references, not in adjectives.
Traps that cost marks
- Choosing a subject by rumour rather than by syllabus overlap and answer-writing comfort.
- Preparing only Paper I; both papers carry equal weight.
- Writing generic essays instead of subject-specific analysis with diagrams, cases or data.
- Ignoring previous-year question patterns, which repeat themes.