ISRO Exam Pattern 2025: Total Marks, Marking Scheme

ISRO Exam Pattern 2025 consists of 80 objective-type questions from specific technical fields and 15 questions from General Aptitude, all of which carry equal marks. ISRO 2025 exam pattern is for 120 minutes in total. Each ISRO 2025 question pattern will be worth 1 mark. ISRO marking scheme will also have a - 0.25 mark deduction.

The Indian Space Research Organization decides the ISRO recruitment 2025 exam pattern. ISRO paper pattern would help the candidates plan their time more effectively and reduce the chances of a candidate being unable to attempt the entire question paper in the given period. The exam pattern details for the ISRO 2025 exam are given below.

Apply Online: ISRO Application Form 2025

Practice: ISRO Previous Year Question Paper

ISRO Exam Pattern 2025

Candidates who have applied for the Assistant, Junior Personal Assistant, Stenographer, and Upper Division Clerk posts should check the tables to get the latest ISRO exam pattern 2025.

• A single objective-type paper with a duration of 120 minutes will be given to the participants.
• There is a negative marking of 0.25 for each incorrect answer.
• And 1 mark will be awarded for each correct answer. 

ISRO Exam Pattern 2025	Marking
Marking Scheme	3 marks for each Question
Negative Marking	-1 for Wrong Answers

Also Read: ISRO Syllabus 2025

ISRO UDC Exam Pattern 2025

Before we get into the major syllabus topics and ISRO exam pattern 2025 of the UDC exam, let's take a short look at some significant marks about the exam and ISRO paper pattern in the table below:

Particulars	ISRO Exam Pattern 2025
Name of the Post	Upper Division Clerk (UDC)
No. of Vacancies	358
Selection Process	Written Test, Skill Test
Mode of Examination	Online
Scheme of Examination	Objective-type MCQs
Total No. of Questions	200
Total Marks	Written Test - 200 Skill Test - 100
Marking Scheme	Correct Answer: +1 Wrong Answer: -0.25
Duration	Written Test - 120 minutes Skill Test - 60 minutes
Syllabus Sections	General Intelligence, Reasoning Ability, Quantitative Aptitude, General English, General Knowledge, Basic Knowledge of Computer and Internet

ISRO UDC Test Pattern: Distribution of Marks

ISRO Upper Division Clerk has objective-type questions. ISRO UDC exam pattern marking scheme has +1 for correct answers and - 0.25 for every incorrect answer as part of marking.

Subject Names	No. of Questions & Marks	Time Duration
General English	50 Questions for 50 Marks	120 Minutes
Quantitative Aptitude	50 Questions for 50 Marks
General Intelligence & Reasoning Ability	50 Questions for 50 Marks
General Knowledge	50 Questions for 50 Marks

ISRO Junior Personal Assistant 2025 Pattern

ISRO Junior Personal Assitant has objective-type questions. ISRO JPA exam pattern marking scheme has +1 for correct answers and - 0.25 for every incorrect answer as part of marking.

Subject Names	No. of Questions & Marks	Time Duration
English Language & Comprehension	100 Questions for 100 Marks	120 Minutes
General Intelligence & Reasoning Ability	50 Questions for 50 Marks
Quantitative Aptitude and General Knowledge	50 Questions for 50 Marks

ISRO Stenographer Test Pattern 2025

Candidates studying for the ISRO Stenographer 2025 test must be conversant with the exam pattern in order to study properly. ISRO 2025 exam pattern can be found in the table below. It should be noted that wrong responses will be deducted 0.25 marks.

Subject	No. of Questions/Marks	Duration
General English	50	120 Minutes
Quantitative Aptitude	50
General Intelligence & Reasoning ability	50
General Knowledge	50
Total	200	120

Stenography Exam Pattern 2025: Distribution of Marks

ISRO Stenographer has objective-type questions. ISRO JPA exam pattern marking scheme has +1 for correct answers and - 0.25 for every incorrect answer as part of marking.

• 300-word shorthand test at 60 words per minute (Time: 5 minutes).
• The text must be transcribed on the computer (time limit: 30 minutes, plus compensatory time for PWBD candidates).
• Short-hand dictation work, i.e. strokes, etc., must be done in Pittman's short-hand (long hand is not permitted), or the transcript will be rejected.
• Method of calculating errors in the Stenography Skill Test:- Error percentage = (Full Mistakes + Half Mistakes/2) x 100 
• The total number of words in the master passage The percentage will be rounded to the nearest two decimal places. For example, 5.009 is handled as 5.001, and 5.001 is treated as 5.00. 

ISRO Computer Literacy Test

Skill Test (on Computer) for Assistant/UDC/JPA/Stenographers

Subject Names	Marks	Time Duration
MS Word	35	60 Minutes
MS Excel	35
MS PowerPoint	30

Important Link: ISRO Answer Key 2025

ISRO 2025 Exam Pattern for Assistant Exam

Candidates must be conversant with the ISRO Exam Pattern 2025, which includes the number of parts, the weightage of questions and marks in each section, and the time given to complete the exam. The table below contains the ISRO Exam Pattern 2025 for the position of Assistant/UDC.

Subjects	Number of Questions/Marks	Duration
General English	50	120 minutes
Quantitative Aptitude	50
General Intelligence & Reasoning ability	50
General Knowledge	50
Total	200	120 minutes

ISRO Assistant Marking Scheme

 Below is the detailed marks distribution and duration for the ISRO assistant written exam . 

• Each question will be worth one mark.
• There will also be a 0.25 marks deduction.

ISRO Written Test

The ISRO Assistant exam pattern and selection process are outlined here. Candidates wishing to take the exam must go through two steps of the selection process:

• The written test will carry 200 marks divided equally in all the four subjects included in the syllabus. 
• The time allotted to complete the exam will be 120 minutes.
• There will be a negative marking of -0.25 marks in the exam.

ISRPO Skill Test 

The ISRO assistant skill test pattern assesses a candidate's knowledge of computer applications such as Microsoft Word, Microsoft Excel, and Microsoft PowerPoint. Candidates will be shortlisted for the skill test in the ratio of 1:5 (maximum) for a category-wise number of vacancies with a minimum of 10 candidates based on their performance in the written test. Specific/additional candidates will be shortlisted in a 1:5 ratio, regardless of reserved candidates, if any.

Subject	Marks	Duration of the test
MS Word	35	60 minutes
MS Excel	35
MS Powermarks	30

Must Read: ISRO Entrance Exam after 12th

ISRO 2025 Pattern for PRT, PGT and TGT

Examine the Grade Distribution for PGT and TGT papers. There are 5 sections, and the marks distribution varies, therefore candidates must read attentively to understand the marks distribution.

Subjects	Marks	Question
Hindi	15 marks	15 questions
English	15 marks	15 questions
Reasoning	40 marks	40 questions
Current Affairs	40 marks	40 questions
Teaching Methodology (Subject Concerned) for TGT PGT	40 marks	40 questions
Teaching Methodology for PRT
Total marks	150 marks	150 questions

ISRO Scientist Engineer Exam Pattern

The exam pattern for ISRO 2025 Scientists/Engineers has been given below. Before starting, candidates should review the following table for an overview of the ISRO Exam Pattern:

Particulars	ISRO Exam Pattern 2025
Type of Questions	Objective type
Total No. of Questions	80
Medium	English
Mode	Offline
Duration	90 Minutes
Total Marks	240
Marking Scheme	3 marks for each question
Negative Marking	-1 for wrong answers

Subject-Wise Marks Distribution for Scientist/ Engineer

The subject-wise marks distribution for Scientist/Engineer positions in the table below.

Subject	No.of Questions	Marks
Technical Subject	50	150
Computer Science	30	90
Total	80	240

Recommended: ISRO Books 2025

ISRO Technical Assistant

There will be two components to the ISRO Technical Assistant exam: a written exam and a competence test. Part A, Part B, and Part C of the written test will be separated into three portions.

Part A will include questions on general knowledge, Part B will include questions about mathematics, and Part C will include questions about the applicable discipline. Candidates will be selected based on their performance in the written exam as well as the skill test.

Exam Type	Number of Questions	Maximum Marks
Written Exam	80	80
Skill Test	20	20
Total	100	100

Section-wise Weightage for ISRO Technical Assistant Exam

The ISRO Technical Assistant written exam is divided into three sections: Part A, Part B, and Part C, which stand for General Knowledge, Mathematics, and Relevant Discipline, respectively.

The table below shows the weightage of the ISRO Technical Assistant recruitment exam per section:

Sections	Number of Questions	Maximum Marks
Part A: General Knowledge	20	20
Part B: Mathematics	20	20
Part C: Relevant Discipline	40	40

Marking Scheme for ISRO Technical Assistant Exam

The following is the marking scheme for the ISRO Technical Assistant Recruitment exam:

• Each question is worth one mark.
• Incorrect responses are penalised with negative marking, with a third of the marks given for each question deducted.
• Unanswered questions will not receive negative marks.
• If a candidate does not attempt a question, no marks will be removed or granted.

ISRO Scientific Assistant Exam Pattern 2025

Knowing the exam format allows you to plan your preparation accordingly. As a result, review the ISRO Scientific Assistant Exam Pattern to understand the exam's grading structure, question kinds, and so on.

ISRO Scientific Assistant Written Exam Pattern

• The questions will be of the objective variety.
• Each accurate answer is worth one point.
• 0.33 marks will be deducted for each incorrect answer.

Particulars	ISRO Exam Pattern 2025
No. of Questions	80
Marks per Question	1
Total Marks	80
Exam Duration	1.5 hours

ISRO Scientific Assistant Skill Test

The SRO Scientific Assistant Skill Test carries a weightage of 100 marks. Below are important details about the same:

• The test is only qualifying in nature.
• The minimum qualifying marks are 50 for Unreserved category candidates & 40 for reserved category candidates.

ISRO Scientist Exam Pattern for Technician B

Candidates who have applied for the role of Technician B and Technical Assistant posts in ISRO must keep a note of the following marks.

• The examination lasts 120 minutes.
• The exam will consist of 80 questions.
• The exam has a total of 320 marks.
• Each accurate answer will receive four marks.
• In the exam, only objective type questions are asked.
• The language medium will be English and Hindi.
• One mark will be deducted for each incorrect response.

ISRO Test Pattern 2025 for Teacher Exam

The written test for the ISRO Teacher Vacancy is held at the Satish Dhawan Space Centre, Sriharikota (SDSC SHAR). Paper-I is a three-hour paper written in nature. Paper-II is a Skill Test that lasts three hours.

ISRO Teacher Exam	Duration
Written Test	3 Hours
Skill Test	3 Hours

ISRO SC/SD Exam Pattern 2025

Stages/Paper	Total Questions & Marks	Time Duration
Written Test (Part A) [Specific Discipline]	80 (1 Mark each)	120 Minutes
Written Test (Part B) [Aptitude/ Ability Tests]	15 (total of 20 Marks)
Interview

ISRO Catering Attendant Exam Pattern

The candidates will find the essential information such as the total number of questions, total marks, duration of examination and so on in the table mentioned below.

Particulars	ISRO Exam Pattern 2025
Mode of Exam	Online
Duration	120 Minutes
No. of Questions	75
Total Marks	300

ISRO Exam Pattern for Fireman 2025

The ISRO Fireman Selection Process consists of a Preliminary Medical Test (PMT) followed by a Physical Efficiency Test (PET), Detailed Medical Examination (DME), and a Written Exam.

With the help of the ISRO Fireman Exam Pattern, the candidates will get detailed information about the exam pattern, marking scheme, difficulty level, etc. The ISRO Fireman Exam Pattern for various selection stages are discussed below:

Preliminary Medical Test

The Preliminary Medical Test will be conducted before the Stage 1 Physical Efficiency Test. Only the candidates who clear this round will be eligible to appear for the next round of the selection process.

The following medical tests will be conducted under PMT:

• Height Measurement
• Weight Measurement
• Visible Structural Abnormality

Parameter	Men	Women
Height (Minimum)	165 cm	155 cm
Weight (Minimum)	50 kg [BMI 18-28]	43 kg [BMI 18-28]
Waist to Hip Ratio
Chest on Expiration (min.)	81 cm	Not Applicable
Chest on Inspiration (min.)	86 cm	Not Applicable
Chest Expansion (min)	5 cm	5 cm
Distant Vision	6/6 without glasses or any other aid in each eye	6/6 without glasses or any other aid in each eye
Near Vision	Normal	Normal
Field of Vision	Full	Full
Hearing	Normal (By Tuning fork tests)	Normal (By Tuning fork tests)
Psychiatry	Not knownPsychiatric Illness	Not knownPsychiatric Illness
Heart Sounds	Normal	Normal
ECG	Normal	Normal
Respiratory Systems	Normal	Normal
Neurological System	Normal	Normal
Musculoskeletal system	No clinical evidence of disease	No clinical evidence of disease

Physical Efficiency Test

The Physical Efficiency Test will be done in two parts to determine whether or not candidates meet the physical standard criteria. Only applicants who passed Stage 1 of the PET will be invited to the detailed medical examination, and those who pass the DME will be invited to Stage 2 of the PET round.

Check out the detailed Physical Efficiency Test exam pattern for both phases below.

Physical Efficiency Test- Stage 1

Male applicants must run 1500 metres in 7 minutes if they are under the age of 40, and 8 minutes if they are above the age of 40.
Female applicants must run 800 metres in 4 minutes if they are under the age of 40, and 5 minutes if they are above the age of 40.

Physical Efficiency Test- Stage 2

Qualifying Criteria for Age up to 40 years

Event	Male	Female
Rope climbing (by hands only)	5 meters from ground level	4.5 meters from ground level
Carrying by fireman’s lift a 64kg weight (human dummy)	90 meters in 60 seconds	90 meters in 75 seconds
Long Jump (best of 3 attempts)	3.8 meters	3.5 meters
Running 100 meters (Shoes with spikes not allowed)	15 seconds	16.5 seconds

Physical Efficiency Test Stage 2

Candidates are urged to prepare thoroughly for the written test, as the ultimate selection will be based on the marks received in the written test for qualifying criteria for age above 40 years.

Event	Male	Female
Rope climbing (by hands only)	4.5 meters from ground level	4.0 meters from ground level
Carrying by fireman’s lift a 64kg weight (human dummy)	90 meters in 75 seconds	90 meters in 90 seconds
Long Jump (best of 3 attempts)	3.5 meters	3.2 meters
Running 100 meters (Shoes with spikes not allowed)	16.5 seconds	18 seconds

Written Test

The ISRO Fireman exam pattern is not yet declared on the official website. However, the candidates appearing for the recruitment process can check the expected exam pattern discussed below:

Particulars	ISRO Exam Pattern 2025
Posts Name	Fireman A
Total Questions	100
Duration	120 minutes
Total Marks	100
Negative Marking	0.25
Passing Marks	50%

Skill Test

• The final stage of the ISRO Fireman Recruitment will be the Skill Test. The Skill Test will be on a purely "go-n-go" basis, meaning that it will be qualifying in nature.
• The final selection will be based on the marks obtained by the candidates in the Written Test, 

Scientist Engineering 'SC' (CEPO) Pattern 2025

Single objective type paper with two sections (Part 'A' and Part 'B') with a time limit of 120 minutes (with compensating time for PwD candidates).

• There are 80 Multiple Choice Questions (MCQs) with 1 mark each (+1 and -1/3 marking pattern).
• The core specialization/discipline will be the basis for 75% of the questions.
• The associated area themes will be covered in 25% of the questions.
• Aptitude/Ability Tests - Part 'B' There are a maximum of 15 Multiple Choice Questions (MCQs) with a total of 20 marks (no negative marks).
• Numerical Reasoning, Logical Reasoning, Diagrammatic Reasoning, Abstract Reasoning, and Deductive Reasoning will be tested.

ISRO Exam Pattern for Driver A Posts

Check out the ISRO Driver exam pattern in detail in the following table.

Particulars	ISRO Exam Pattern 2025
Posts Name	Heavy Vehicle Driver, Light Vehicle Driver
Total Questions	100
Duration	120 minutes
Total Marks	100
Negative Marking	0.25
Passing Marks	50%

ISRO IPRC Mode of Selection 2025

Name of the Post	Mode of Selection
Technical Assistant/Technician B/Draughtsman B	Written Test+Skill Test (Curriculum based)
Heavy Vehicle Driver A/Light Vehilce Driver A	Written Test+Skill Test (Driving Test)
Fireman A	Written Test + Skill Test (PET+Medical Examination)

ISRO IPRC Draughtsman B Exam Pattern

Particulars	ISRO Exam Pattern 2025
Posts Name	Technical Assistan, Technician B and Draughtsman B
Total Questions	80
Duration	90 minutes
Total Marks	80
Negative Marking	0.33
Passing Marks	UR : 32 MarksReserved Categories : 24 Marks

ISRO Officer Exam Pattern 2025

Subject Name	Total Questions	Time Duration
Arithmetic and Test of reasoning	36	2 & 1/2 Hours
English Grammar	32
Area	36
Descriptive test	02

ISRO JTO Exam Pattern 2025

Part-A (Objective type questions) and Part-B (Descriptive type questions) of the Junior Translation Officer are worth 100 marks each.

Part	No of Questions/Marks	Duration
Part A	50	120 Minutes
Part B	50
Total	100

ISRO Junior Translation Officer Marking Scheme

• Part-A (50 questions) objective-type questions receive one mark each.
• Part-B descriptive type questions include (i) two passages for translation for 20 marks each, and (ii) an elaboration of a particular thought (any two out of four thoughts) worth 5 marks each.
• The written examination will last two hours (120 minutes).
• Those who obtain a minimum of 60% in the written test will be pronounced qualified.

Skill Test Pattern 2025

• The skill Test consists of two passages of 20 marks each for precis writing and two passages of 30 marks each for translation from Hindi to English and vice versa.
• The Skill Test is scheduled to last two hours (120 minutes).
• Skill tests will be conducted on a go-or-no-go basis, and results will not be considered for selection.
• Those who get a minimum of 60% on the skill test will be declared qualified.
• Only the answer scripts of the skill test for applicants who receive a minimum of 60% on the written test will be examined.

ISRO Exam Pattern 2025 for Other Post

Nurse-B, Pharmacist-A, Radiographer-A, Lab Technician-A, Assistant (Rajbasha), Cook, Light Vehicle Driver ‘A’, Heavy Vehicle Driver ‘A’ and Fireman ‘A’ post for written test in ISRO exam.

Subjects	Total No. of questions & Mark	Duration
Hindi Language & Grammar	50	120
General English	50	120
QA and General Knowledge	50	120
General Intelligence and Reasoning	50	120
Motor Vehicles Act, 1988 as issued/ammended from time to time	50	120
Elementary English of 8th Standard Level	15	120
Elementary Arithmetic of 10th Standard Level	15	120
General Knowledge	20	120

ISRO 2025 Exam Pattern: Administrative, Account, Purchase and Stores Officer

An offline (Pen and Paper-Based) test will be conducted. ISRO 2025 exam pattern is as follows.

• No. of Papers and Sections - 1 paper with 4 sections
• No. of Questions - 106 questions
• Duration -  2 hours and 30 minutes
• Total Marks - 124 marks
• Negative Marking -  0.25 marks cut for every wrong answer

ISRO 2025 Exam Pattern - Administrative, Account, Purchase and Stores Officer

Subjects	No. of Questions	Marks Awarded
Arithmetic and Reasoning	36	1 mark each
English	32
Trade-Related	36
Descriptive Type	2	10 marks each

Note: Part A, B and C have Objective type questions.

Recommended: ISRO Scientist Salary 2025

ISRO Exam Syllabus 2025

The syllabus for the ISRO Recruitment exam includes the following topics:

ISRO 2025 Scientist/Engineer 

The ISRO Recruitment exam syllabus for Scientist/Engineer consists of the following topics:

Syllabus for Civil Engineering

• Building Materials
• Surveying
• Transportation Engineering
• Soil Mechanics
• Hydraulics
• Irrigation Engineering
• Estimating, Costing, and Valuation
• Environmental Engineering
• Structural Engineering
• Theory of Structures
• RCC Design
• Steel Design
• Concrete Technology

Syllabus for Electrical Engineering

• Basic concepts
• Circuit law
• C Fundamentals
• Basic Electronics
• Measurement and Measuring Instruments
• Electrical Machines
• Fractional Kilowatt Motors
• Single-phase Induction Motors
• Synchronous Machines
• Magnetic Circuit
• Generation
• Transmission and Distribution
• Estimation and Costing
• Utilization and Electrical Energy

Syllabus for Electronics and Communication

• Basics of Circuits and Measurement Systems
• Digital Electronics
• Analytical, Optical Instrumentation
• Analog Electronics
• Electrical and Electronic Measurements
• Transducers, Mechanical Measurement and Industrial Instrumentation
• Control Systems and Process Control
• Signals, Systems, Communications, etc.

Syllabus for Mechanical Engineering

• Heat Engines
• Thermodynamics
• Fluid Mechanics
• Hydraulics
• The strength of Materials
• Structural Engineering
• Automobile Engineering
• Theory of Machines
• Manufacturing Technology
• Industrial Engineering & Management, etc.

Syllabus for Computer Science

• Databases
• Computer Organization and Architecture
• Operating System
• Compiler Design
• Web technologies
• Information Systems and Software Engineering
• Computer Networks
• Theory of Computation

Syllabus for Automobile Engineering

• Automobile Machine Shop
• Automobile Mechanics
• Auto Repair and Maintenance
• Automotive Engine Auxiliary Systems
• Automotive Engines
• Auto Electrical & Electronics
• Automotive Estimation and costing
• Automotive pollution and control
• Hydraulics, pneumatics and power plant
• Automobile Chassis and Transmission
• Modern vehicle technology
• Motor vehicle management
• Special vehicle equipment Strength of Materials
• Vehicle Maintenance
• Foundry, Welding and Sheet Metal

ISRO 2025 Syllabus for Driver

• Vehicle Act
• English
• Arithmetic Ability
• General Knowledge

ISRO 2025 Assistant/Upper Division Clerk Syllabus

• General English
• General Studies
• General Knowledge
• Arithmetic
• Computer Literacy

ISRO 2025 Accounts Officer Syllabus

• General Science.
• India’s history.
• World Geography.
• Indian National Movement.
• Indian Polity.
• Economy and Culture.
• Commerce and Trade & Population.
• Ecology and urbanization.
• India’s Geological & Natural Resources.
• The current national, and international main events.
• Uttar Pradesh with special knowledge.
• Indian agriculture.
• Education, culture, agriculture, industry and trade, Living & social traditions, etc.

ISRO 2025 Administrative Officer Syllabus

• Non­-Verbal series.
• Semantic similarity.
• Coding and Decoding.
• Similarities and differences.
• Related concepts.
• Visualization of the space.
• Classification of the Figurative.
• Arithmetic Reasoning.
• The number of arithmetic series.
• Symbolic/ no classification.

ISRO 2025 Assistant Syllabus

• General English
• General Intelligence & Reasoning
• General Awareness
• Arithmetic

ISRO 2025 Stenographer Syllabus for Computer Literacy

• Computer Fundamentals.
• Operating System.
• MS Excel – Spread Sheets.
• Computer Software.
• MS Word – Word Processing.
• MS Power-marks – Presentation.
• Internet Usage etc.