I will tell you exam pattern for state service prelims exam conducted by Chhattisgarh Public Service Commission (CGPSC) so that you can check it easily.

Here is the exam paper pattern

In the Preliminary Examination, there will be 2 compulsory papers of 2 hours duration each.

Both the question papers will have objective type multiple choice questions.

There will be five choices of answers for each question out of which one is to be selected.There will be negative marking for the wrong answer.

First Question Paper:

General Studies (Questions 100, Marks 200, Duration 2.00 Hours).

2 marks will be awarded for each right answer, and 1 mark will be deducted for each wrong answer.

Marks obtained=2R-W (where R stands for a number of right answers and W stands for number of wrong answers).

Second Question Paper:

Aptitude Test (Questions 100, Marks 200, Duration 2.00 Hours).

2 marks will be awarded for each right answer, and 1 mark will be deducted for each wrong answer.

Marks obtained=2R-W (where R stands for a number of right answers and W stands for number of wrong answers).

Here is the syllabus
First Question Paper:
There shall be 50 Questions from Part-I & Part-II each. Part-I & Part-II Syllabus is given below

Part-I: General Studies
History of India and Indian National Movement.
Physical, Social & Economic Geography of India.
Constitution of India & Polity.
Indian Economy.
General Science & Technology.
Indian Philosophy, Art, Literature & Culture.
Current Affairs & Sports.
Environment.

Part-II: General Knowledge of Chhattisgarh
History of Chhattisgarh, & Contribution of Chhattisgarh in Freedom Movement.
Geography, Climate, Physical status, Census, Archeological and Tourist Centres of Chhattisgarh.
Literature, Music, Dance, Art and Culture, Idioms and Proverbs, Puzzle/Riddle, Singing of Chhattisgarh.
Tribes, Special Traditions, Teej and Festivals of Chhattisgarh.
Economy, Forest, and Agriculture of Chhattisgarh.
Administrative Structure, Local Government, and Panchayatiraj of Chhattisgarh.
Industry in Chhattisgarh, Energy, Water and Mineral Resource of Chhattisgarh.
Current Affairs of Chhattisgarh.

Second Question Paper: Aptitude Test
Interpersonal skills including communication skills.
Logical reasoning and analytical ability.
Decision-making and problem-solving.
General mental ability.
Basic numeracy (numbers and their relations, orders of magnitude, etc.) (Class X level), Data interpretation (charts, graphs, tables, data sufficiency, etc. -Class X level).
Knowledge of Hindi Language (Class X level).
Knowledge of Chhattisgarhi Language.