ISRO Syllabus 2026: Assistant, UDC, and JPA Exam Pattern & PDF

ISRO Assistant, UDC, and JPA Syllabus 2026

The ISRO Exam 2026 features an objective-type written test encompassing English, Quantitative Aptitude, General Intelligence & Reasoning, and General Knowledge. Section-wise weightages may vary across Assistant, UDC, and JPA positions. Aspirants can easily download the official ISRO Syllabus PDF 2026 and examine the detailed exam structure outlined in the recruitment notification to access comprehensive topic lists.

ISRO Syllabus: Overview

ISRO Assistant/UDC Exam Pattern 2026

The written examination for Assistant and Upper Division Clerk (UDC) roles comprises 200 objective-type questions valued at a total of 200 marks. Each correct answer awards 1 mark, while a penalty of 0.25 marks is applied for every incorrect response. The total time allotted to complete the test is 120 minutes.

ISRO JPA Exam Pattern 2026

The Junior Personal Assistant (JPA) examination also features a 200-mark format, though question distribution differs significantly. English Language & Comprehension holds the highest weightage with 100 questions, establishing it as a critical section for JPA aspirants. The test follows the standard objective pattern, awarding 1 mark per correct answer with a 0.25 negative marking deduction for incorrect entries.

ISRO Assistant/UDC Syllabus

The syllabus for Assistant and UDC positions spans four core sections tailored to evaluate candidates' language proficiency, numerical aptitude, logical reasoning, and general awareness.

General English

Questions are meticulously crafted to test candidates’ command over the English language, assessing aspects such as:

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

Quantitative Aptitude

Candidates are advised to thoroughly prepare the following essential 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 applicants' logical deduction and analytical skills. Key topics incorporated in this syllabus 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 component measures candidates’ awareness of ongoing national affairs and core general subjects. Aspirants should focus on:

• 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 places primary emphasis on the English Language & Comprehension module, which accounts for half of the examination paper. Candidates should concentrate on refining grammar, vocabulary, reading comprehension, and writing abilities alongside standard aptitude and reasoning.

English Language & Comprehension

Candidates should focus their preparation on the following core 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 syllabus for the JPA role closely mirrors that of the Assistant/UDC examination, featuring:

• 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

Important study areas to cover 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 should systematically study the following topics:

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

ISRO Syllabus 2026 for Assistant/UDC PDF Download Link

ISRO Syllabus 2026 for JPA PDF Download Link

Preparation Tips for ISRO Assistant, UDC & JPA Exam 2026

Aligning your preparation with the latest syllabus can drastically improve your qualification odds. Keep these expert preparation tips in mind:

• 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.