OSSC CGL Exam Syllabus 2025

For Prelims

Subject	Syllabus
Arithmetic and Numerical Ability	Verbal and Non–Verbal types of reasoning, Similarities, Differences, Space visualizations, Problem-Solving, Analysis, Judgment, Decision Making, Visual Memory, Discrimination, Observations, Relationships, Concepts, Arithmetical Reasoning, Verbal and Figure Classification and Arithmetical Number Series
Reasoning Ability	Simplification, Decimals, Data Interpretations, Fractions, HCF, LCM, Percentage, Ratio and Proportions, Profit and Loss, Average, Discount, Simple & Compound Interest, Mensuration, Time and Work, Time and Distance, and Tables and Graphs.
Computer Awareness	Object-oriented Designing, Proposing and creating architecture and re-usable libraries in NET, JavaScript, Networking with LAN/WAN, ASP.NET, ADO.NET, Java & JavaScript, Manageable switch/ router & wireless LAN with network security, Firewall & Antivirus, UML, C++, DOS, PHP, MS SQL Server, Oracle PL_SQL Architecture, Novel, Window OS client & server, Linux OS-client & server, Web Server, Window Series, JSON, Grid Computing, OS, Image processing, Digital signal Processing, VLSI and Embedded System
Current Events	Environment, Current Affairs, Indian History, Polity, Constitution, Sports, Art and Culture, Indian Geography, Economics, Everyday Science, Scientific Research and National/International Organizations.

For Mains

Paper	Subject	Syllabus
Mains Paper 1	English Language	Sentence Arrangement, Error Correction (Phrase in Bold), Fill in the Blanks, Prepositions, Homonyms, Synonyms, Direct and Indirect Speech, Word Formation, Sentence Completion, Sentence Improvement, Active and Passive Voice, Transformation, Spotting Errors, Error Correction (Underlined Part), Spelling Test, Passage Completion, Antonyms, Topic Rearrangement of Passage, Joining Sentences, Idioms and Phrases, Substitution, Theme Detection, Data Interpretation and Spelling Test.
Mains Paper 1	Odia Language	Interrogation, Complex, Affirmative, Negative, Exclamatory, Simple, Compound Voice, Transformation of Words (Nouns to Adjective and Adjective to Nouns), Antonyms and synonyms, Correction of common errors in words, Idioms and Phrases, Punctuation Marks, Grammar, Sandhi, Samasa, Taddhita and Krudrata, Essay writing based on familiar topics and personality, Letter Writing, Personal Letter, Applications, Business and Official, Translation (One English passage around 100 words to be translated into Odia) and Comprehension of an unseen passage.
Mains Paper 2	General Studies	Indian Constitution, Indian Economy, Indian and World Geography, History of India, History of Odisha, and General Issues of Environment/Climate Change