ISRO Assistant & UDC Syllabus 2026: Exam Pattern & Subject-Wise Topics

The Indian Space Research Organisation (ISRO) is set to conduct written examinations for Assistant, UDC, and various other roles. Success requires a deep understanding of the latest syllabus and exam pattern to create a strategic study roadmap. The ISRO Assistant & UDC 2026 curriculum spans key sections: English Language, Quantitative Aptitude, General Intelligence & Reasoning, and General Knowledge. This guide provides a comprehensive overview of the topics, marking scheme, and exam structure.

ISRO Assistant UDC Syllabus and Exam Pattern 2026

Preparing for the ISRO Assistant UDC 2026 exam using the official syllabus and exam pattern ensures you focus your energy on high-yield topics, eliminating wasted time on irrelevant subject matter.

ISRO Assistant UDC Recruitment 2026: 244 Vacancies - Check Details Now

ISRO Assistant UDC Exam Pattern 2026

The exam pattern is structured based on the specific post. The assessment consists of 200 objective-type questions, with a total of 200 marks available. Candidates have 150 minutes to complete the paper, and it is important to note that there is a penalty of 0.25 marks for every incorrect answer.

ISRO Assistant/UDC Syllabus 2026

The syllabus for Assistant and UDC positions is meticulously crafted to test candidates on their language proficiency, numerical aptitude, logical reasoning, and overall general awareness.

General English

The English section is designed to measure your grasp of the language, covering the following areas:

• Grammar
• Vocabulary
• Correct usage of words
• Idioms and Phrases
• Sentence formation
• Reading and language understanding
• Writing accuracy and precision

Quantitative Aptitude

To perform well, candidates should prioritize the following key 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 evaluates your logical, analytical, and problem-solving skills. Crucial topics for this section include:

• 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 section gauges your knowledge of contemporary events and fundamental general subjects. Candidates should focus on the following:

• 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/Stenographer Syllabus 2026

The Junior Personal Assistant (JPA) syllabus places a significant emphasis on English Language & Comprehension, which comprises 50% of the total questions. Candidates should hone their grammar, vocabulary, reading comprehension, and writing skills, alongside aptitude and reasoning capabilities.

English Language & Comprehension

Candidates should systematically prepare for these 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 reasoning curriculum for the JPA post aligns closely with the Assistant/UDC exam and encompasses:

• 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 you must study 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

Candidates are encouraged to focus on these essential topics:

• National Current Affairs
• International Current Affairs
• History
• Geography
• Indian Constitution
• Indian Economy
• General Science
• Culture
• Environment
• Static GK

ISRO Syllabus 2026 PDF Link

The Indian Space Research Organisation has officially released the ISRO Syllabus 2026 alongside the recruitment notification. You can use the direct links below to download your specific syllabus PDF.

Download ISRO Assistant/UDC Syllabus 2026 PDF

Download ISRO JPA/Stenographer Syllabus 2026 PDF

Access ISRO Previous Year Question Papers - Download Here