Prepare effectively for the 2026 ISRO recruitment with our comprehensive breakdown of the Assistant, UDC, and JPA syllabus. Get insights into the latest exam patterns, marking schemes, and essential topics for English, Reasoning, Aptitude, and General Knowledge to boost your exam readiness.
ISRO Assistant, UDC, and JPA Syllabus 2026
Aligned with the latest ISRO Exam 2026 standards, the objective-type written test evaluates candidates across English, Quantitative Aptitude, General Intelligence & Reasoning, and General Knowledge. Please note that the section weightage varies significantly between Assistant/UDC and JPA roles.
Candidates can easily download the official ISRO Syllabus 2026 PDF directly from the recruitment notification. This document provides a exhaustive subject-wise syllabus, ensuring you cover every topic required for the Assistant, UDC, and JPA examinations.
ISRO Syllabus: Overview
| Particulars | Details |
| Organization |
Indian Space Research Organisation (ISRO)
|
| Posts |
Assistant, Upper Division Clerk (UDC), Junior Personal Assistant (JPA)
|
| Exam Mode |
Online (Computer-Based Test)
|
| Question Type |
Objective (Multiple Choice Questions)
|
| Negative Marking |
Yes (-0.25 mark for each wrong answer)
|
| Total Duration | 120 Minutes |
| Official Website | www.isro.gov.in |
ISRO Assistant/UDC Exam Pattern 2026
The Assistant and Upper Division Clerk (UDC) written test features 200 objective questions worth 200 total marks. Candidates have 120 minutes to complete the paper, with a penalty of 0.25 marks for every incorrect answer.
| Part | Subject | Questions | Marks |
| A | General English | 50 | 50 |
| B | Quantitative Aptitude | 50 | 50 |
| C | General Intelligence & Reasoning Ability | 50 | 50 |
| D | General Knowledge | 50 | 50 |
| Total | 200 | 200 | |
ISRO JPA Exam Pattern 2026
The Junior Personal Assistant (JPA) exam also consists of 200 marks; however, it prioritizes the English Language & Comprehension section, which accounts for 100 questions. The standard objective format applies, including the 0.25 negative marking policy for wrong responses.
| Part | Subject | Questions | Marks |
| A | English Language & Comprehension | 100 | 100 |
| B | General Intelligence & Reasoning Ability | 50 | 50 |
| C | Quantitative Aptitude & General Knowledge | 50 | 50 |
| Total | 200 | 200 | |
ISRO Assistant/UDC Syllabus
The Assistant and UDC syllabus is strategically structured into four core sections, testing your linguistic proficiency, numerical reasoning, analytical skills, and general awareness.
General English
These questions are meticulously crafted to gauge your command of English, covering areas such as:
- Grammar
- Vocabulary
- Correct usage of words
- Idioms and Phrases
- Sentence formation
- Reading and language understanding
- Writing accuracy and precision
Quantitative Aptitude
For optimal performance, candidates should focus on the following core topics:
- Number System
- Simplification
- LCM & HCF
- Percentages
- Profit and Loss
- Discount
- Ratio and Proportion
- Average
- Simple and Compound Interest
- Time and Work
- Time, Speed and Distance
- Boats and Streams
- Pipes and Cisterns
- Partnership
- Surds and Indices
- Algebra
- Coordinate Geometry
- Polynomials
- Sequence and Series
- Geometry
- Mensuration
- Trigonometry
- Statistics
- Data Interpretation
General Intelligence & Reasoning Ability
The General Intelligence & Reasoning section is designed to test your logical and analytical thinking. Master the following critical syllabus topics:
- Missing Number
- Number Series
- Repeated Series
- Analogy
- Coding and Decoding
- Venn Diagram
- Logical Arrangement of Words
- Sitting Arrangement
- Ranking Arrangement
- Dice
- Cube and Cuboid
- Calendar
- Clock
- Directions
- Counting Figures
- Problems Based on Alphabets
- Sequence
- Mirror Image
- Water Image
- Coded Equations
General Knowledge
This segment measures your grasp of global and national current events. Key preparation areas include:
- Current Affairs (National and International)
- Indian History
- Geography
- Indian Polity
- Indian Economy
- Science and Technology
- Culture
- Environment
- Important Government Schemes
- Static General Knowledge
ISRO JPA Syllabus 2026
The Junior Personal Assistant (JPA) syllabus emphasizes English Language & Comprehension, which makes up 50% of the paper. Success in this role requires a strong focus on grammar, vocabulary, and writing accuracy alongside standard aptitude and reasoning skills.
English Language & Comprehension
Review the following essential JPA-specific topics:
- Spot the Error
- Fill in the Blanks
- Synonyms
- Antonyms
- Detecting Misspelt Words
- Idioms and Phrases
- One Word Substitution
- Sentence Improvement
- Active and Passive Voice
- Direct and Indirect Speech
- Cloze Test
- Reading Comprehension
- Vocabulary
- Grammar
General Intelligence & Reasoning Ability
The JPA Reasoning curriculum mirrors the Assistant/UDC exam, focusing on:
- Missing Number
- Number Series
- Analogy
- Coding-Decoding
- Venn Diagram
- Sitting Arrangement
- Ranking Arrangement
- Dice
- Cube and Cuboid
- Calendar
- Clock
- Directions
- Mirror Image
- Water Image
- Alphabet Problems
- Counting Figures
- Logical Arrangement
- Coded Equations
- Sequence-based Questions
Quantitative Aptitude
Key topics for your review include:
- Number System
- Percentages
- Profit and Loss
- Discount
- Ratio and Proportion
- Average
- Simple Interest
- Compound Interest
- Time and Work
- Time, Speed and Distance
- Boats and Streams
- Pipes and Cisterns
- Partnership
- Simplification
- LCM & HCF
- Surds and Indices
- Algebra
- Coordinate Geometry
- Geometry
- Mensuration
- Trigonometry
- Statistics
- Data Interpretation
General Knowledge
Ensure you are well-versed in the following subject areas:
- National Current Affairs
- International Current Affairs
- History
- Geography
- Indian Constitution
- Indian Economy
- General Science
- Culture
- Environment
- Static GK
Download ISRO Assistant/UDC Syllabus 2026 PDF
Download ISRO JPA Syllabus 2026 PDF
Preparation Tips for ISRO Assistant, UDC & JPA Exam 2026
Strategic preparation based on the latest syllabus is key to success. Follow these expert tips to maximize your score:
- Carefully understand the latest syllabus and exam pattern before starting your preparation.
- Prepare a daily study schedule covering all sections.
- Give extra attention to English if you are preparing for the JPA examination.
- Practice Quantitative Aptitude and Reasoning questions daily.
- Read newspapers and monthly current affairs magazines for the General Knowledge section.
- Attempt mock tests regularly to improve speed and accuracy.
- Revise formulas, grammar rules, and important current affairs frequently.
- Practice previous years’ question papers to understand the difficulty level and question trends.
FAQs
The ISRO Assistant and UDC exam covers General English, Quantitative Aptitude, General Intelligence & Reasoning Ability, and General Knowledge.
The paper consists of 200 objective questions for 200 marks to be completed in 120 minutes. Be cautious of the 0.25 negative marking per incorrect answer.
Yes. The JPA exam places a high priority on English Language & Comprehension with 100 questions, while the remainder covers Reasoning, Aptitude, and General Knowledge.
Yes, both the Assistant/UDC and JPA examinations enforce a negative marking of 0.25 marks for every incorrect response.
The ISRO JPA exam features 200 objective questions worth 200 marks, with a strict time limit of 120 minutes.
Official syllabus PDFs for 2026 can be downloaded directly from the ISRO recruitment portal or the official ISRO website.
In the JPA exam, English Language & Comprehension is the most critical section, carrying 100 of the total 200 marks.
To excel, thoroughly cover the syllabus, practice with previous years' papers, attempt regular mock tests, stay updated with current affairs, and focus on improving your speed and accuracy.