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CSIR ASO Syllabus 2026 - Exam Pattern, Selection Process & Subject-Wise Topics

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  • Download Mobile APP
  • Updated July 15, 2026 12:40 PM
  • by J Divya
  • The Council of Scientific and Industrial Research (CSIR) conducts the recruitment exam for Assistant Section Officer (ASO) posts. This article covers the CSIR ASO syllabus 2026, the stage-wise exam pattern, the Computer Proficiency Test (CPT), minimum qualifying marks, and subject-wise topics. Knowing the syllabus and pattern together helps candidates decide how much time to give each paper and which sections carry the most weight.
  • Note on source: The details below are compiled from publicly available exam-prep content rather than a verified official CSIR notification PDF. Candidates should cross-check every figure especially marks, timings, and qualifying percentages against the latest official CSIR notification once it is released, since the underlying notification referenced by available sources appears to date to an earlier recruitment cycle.
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CSIR ASO Syllabus and Exam Pattern 2026 - Overview

ParticularDetails
Conducting BodyCouncil of Scientific and Industrial Research (CSIR)
PostAssistant Section Officer (ASO)
VacanciesReported as 100 posts in available sources not confirmed against an official CSIR notification
Selection StagesStage 1 (Paper I & Paper II - Objective), Stage 2 (Paper III - Descriptive), Stage 3 (Computer Proficiency Test)
Total Objective Questions (Stage 1)350 (Paper I: 150 + Paper II: 200) see note under Exam Pattern below on a conflicting "200 questions" figure found in source material
Negative Marking0.25 marks deducted per wrong answer in objective papers
CPT Duration1 hour
CPT Maximum Marks100 (qualifying in nature; not added to final merit)
Official Websitecsir.res.in
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CSIR ASO Selection Process 2026

  • Selection for the ASO post is spread across three stages, and candidates must clear each stage to move to the next.
  • Stage 1 - Objective Papers: Candidates attempt Paper I (General Awareness plus English Language and Comprehension) and Paper II (General Intelligence, Reasoning and Mental Ability). Both are multiple-choice papers with negative marking.
  • Stage 2 - Descriptive Paper: Candidates who clear Stage 1 attempt Paper III, a descriptive test in English or Hindi covering essay, precis, and letter/application writing.
  • Stage 3 - Computer Proficiency Test (CPT): Candidates who meet the required threshold in Stage 2 take the CPT, a practical, computer-based test of office software skills. It is qualifying only CPT marks are not counted toward final merit, but candidates must clear the prescribed minimum percentage for their category.
  • Final merit is drawn from the objective and descriptive stages, with the CPT acting as a qualifying gate rather than a merit-scoring stage.

Stage 1 & Stage 2: Written Exam Pattern

StagePaperSectionTypeMaximum MarksDuration
Stage 1Paper IGeneral AwarenessObjective100 Marks1 Hour
English Language and ComprehensionObjective100 Marks1 Hour
Paper IIGeneral Intelligence, Reasoning and Mental AbilityObjective100 Marks1 Hour
Stage 2Paper IIIEnglish/Hindi - DescriptiveDescriptive100 Marks1 Hour
  • Important discrepancy to verify: The source material states in one place that "the CSIR exam comprises a total of 200 multiple-choice questions," while the stage-wise breakup above (taken from the same source) totals 350 objective questions across Paper I and Paper II. I have not resolved this conflict by guessing candidates should confirm the exact question count against the official notification before relying on it.
  • Each wrong answer in the objective papers carries a deduction of 0.25 marks.

CSIR ASO Syllabus 2026

  • The written exam is split into three papers. Below is the subject-wise topic breakdown as found in available source material.

How to Prepare for the CSIR ASO Exam 2026

  • Map the syllabus to a timetable first. Split preparation time across General Awareness, English, Reasoning and the descriptive paper based on the marks each carries (100, 50, 200 and 150 respectively), rather than spending equal time on all sections.
  • Prioritise Paper II. It carries the highest marks (200) among the objective papers, so reasoning and mental ability topics deserve proportionally more practice sessions.
  • Practise CPT tasks on an actual computer, not just in theory. Since the CPT is a hands-on test of word processing, spreadsheets and presentations, timed practice on real software matters more than reading about it.
  • Build a current affairs habit early. Given the current events component in Paper I, follow a daily/weekly national and international news digest rather than cramming close to the exam.
  • Time your descriptive writing. Practise essay, precis and letter writing within the 2-hour limit so pacing itself doesn't cost marks in Stage 2.
  • Revise negative-marking-prone areas. With a 0.25 deduction per wrong answer in objective papers, attempt only questions you're reasonably confident about, and use mock tests to gauge your safe attempt count.

Important Links

  • CSIR ASO Syllabus PDF: Click Here
  • Official Website: csir.res.in
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Q1. What is the CSIR ASO syllabus 2026?

  • The syllabus covers three papers: Paper I (General Awareness and English Language and Comprehension), Paper II (General Intelligence, Reasoning and Mental Ability), and Paper III (English/Hindi Descriptive). A qualifying Computer Proficiency Test (CPT) follows as Stage 3.

Q2. What is the exam pattern for CSIR ASO 2026?

  • Stage 1 has Paper I (150 objective questions, 150 marks) and Paper II (200 objective questions, 200 marks), both in 2 to 2.5 hours. Stage 2 is a descriptive paper worth 150 marks in 2 hours. Stage 3 is the CPT, worth 100 marks and qualifying only.

Q4. Is the CSIR ASO syllabus the same as the CSIR SO syllabus?

  • Paper I, Paper II and Paper III cover the same sections for both SO and ASO posts. The stages differ at the end: SO candidates go through an interview as Stage 3, while ASO candidates take the Computer Proficiency Test as Stage 3.
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