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Exam pattern of OSSC CHSL Exam 2025

Prelims exam pattern

Stages of Examination Type of Examination No. of Paper Marks Total Marks Remarks
Stage-I Preliminary Examination

One Paper

  • Arithmetic- 10th standard
  • Data Interpretation (Chart, Graph, Table,
  • Data Sufficiency etc.) - 10th standard
  • Logical Reasoning and Analytical Ability,
  • General Mental Ability.
  • Current Events of National and
  • International Importance.
  • Computer I Internet Awareness
150

The question will be of MCQ type

  • There shall be a negative marking @ 0.25 marks for each wrong answer.
  • Approximately 5 times the number of vacancies category-wise and post-wise shall be shortlisted for the Main Written Examination.
  • The Commission at their discretion may fix minimum qualifying marks in the Preliminary Examination in different categories for different Technical Posts/Services

OSSC CHSL Mains Exam Pattern

There are two stages in the written examination of OSSC CHSL one is prelims and the second is mains.

OSSC CHSL contains two stages for the written examination i.e. Prelims and Mains, candidates must check the below-mentioned table to get the detailed OSSC CHSL Mains Exam Pattern.

Stages of Examination Type of Examination No. of Paper & Marks Total Marks Remarks
Stage-II Main Written Examination Technical Paper - There shall be different Technical Papers for different posts/services as per the qualification prescribed for the post. Detail Syllabus (Regulation 1 of 2023) annexed in annexure 'C' 200 Candidates approximately 2(two) times the vacancies advertised in each category, in each post in order of merit based on the marks in the Written Examination shall be shortlisted for the verification of original documents.
Stage-III Certificate Verification - - The candidate who fails to attend the document verification, his/her name will not be considered for the post.

OSSC CHSL Preparation Strategy

OSSC CHSL is one of the toughest exams. Which requires lots of practice and preparation strategy only then it would be easy for the candidate to complete it. Here is the suggested preparation strategy that will help to prepare for the exam. 

  • Create a Study timetable: As per your schedule make a timetable that fits your schedule and try to give proper time to each subject as well as focus more on the weak subjects. 
  • Collect Study Materials: Try to gather all of the important study materials such as previous year’s exam papers, textbooks as well as relevant study material. Always make sure that you have the study material which contains all the syllabus. 
  • Enhance General Awareness: The general awareness exam is an essential component as well as critical. So, try to be active with all the current events try to read the newspapers daily, and follow the news website. 
  • Improve Your English Language Skills: This is an important factor in the CHSL Exam. Try to be focused on grammar, understanding, writing abilities, and vocabulary. Daily read the English newspaper as well as English books and try to improve your English vocabulary. 
  • Improve Quantitative Aptitude: You are required to solve the mathematics problems daily for the quantitative aptitude section. 

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