ISS - Indian Statistical Service Examination

What is ISS?

The Indian Statistical Service (ISS) is a Central Government statistical service recruited through the Indian Economic Service - Indian Statistical Service Examination conducted by the Union Public Service Commission (UPSC).

The examination is designed for candidates who have the required academic background in Statistics, Mathematical Statistics or Applied Statistics.

ISS officers work in government statistical and analytical functions involving collection, compilation, analysis and interpretation of statistical information and related work.

ISS Full Form

Short Name	Full Form
ISS	Indian Statistical Service
Exam	Indian Economic Service - Indian Statistical Service Examination
Conducting Body	Union Public Service Commission (UPSC)

ISS 2026 Quick Details

Particular	Details
Exam Name	Indian Economic Service - Indian Statistical Service Examination, 2026
Conducting Body	Union Public Service Commission (UPSC)
ISS Vacancies	28 vacancies in the 2026 examination
Notification Date	11 February 2026
Examination Date	19 June 2026
Examination Mode	Written Examination followed by Viva Voce
Written Marks	1000 Marks
Viva Voce	200 Marks

Important

Vacancy, dates, eligibility and other examination conditions can change from one recruitment year to another. Always verify the latest UPSC notification before applying.

ISS Eligibility

Candidates must satisfy the educational, age, nationality and other conditions prescribed in the applicable UPSC examination rules.

Requirement	Details
Educational Qualification	Bachelor's Degree with Statistics, Mathematical Statistics or Applied Statistics as one of the subjects, or a Master's Degree in Statistics, Mathematical Statistics or Applied Statistics from a recognized university/institution.
Statistics in Bachelor's Degree	For the ISS eligibility route based on a Bachelor's Degree, Statistics-related study must satisfy the conditions prescribed in the latest examination rules.
Age	Generally, the candidate must be between 21 and 30 years of age as prescribed for the examination year. Category-wise relaxation may apply.
Nationality	Candidate must satisfy the nationality conditions prescribed by UPSC for the examination.
Physical Fitness	Candidates must satisfy the applicable physical standards prescribed for admission to the examination.

ISS Educational Qualification

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Bachelor's Degree Route

A Bachelor's Degree with Statistics, Mathematical Statistics or Applied Statistics as one of the subjects, subject to the conditions prescribed in the examination rules.

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Master's Degree Route

A Master's Degree in Statistics, Mathematical Statistics or Applied Statistics from a recognized university or institution.

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Important Qualification Rule

Statistics studied only as a minor component for a limited part of a multidisciplinary course may not satisfy the ISS Bachelor's Degree eligibility requirement.

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Final-Year Candidates

Candidates appearing for a qualifying examination may be allowed to apply provisionally subject to the conditions and proof requirements prescribed by UPSC.

Important Qualification Note

For the 2026 ISS examination, the UPSC rules specify that for the Bachelor's Degree route, Statistics should be studied in all years of the Bachelor's Degree course. A candidate should therefore carefully check the latest notification before applying.

ISS Age Limit

Category	Age Requirement
Minimum Age	21 Years
Maximum Age	30 Years for the standard age limit applicable to the 2026 examination
SC / ST	Upper-age relaxation as per applicable Government rules
OBC	Upper-age relaxation as per applicable Government rules
PwBD	Applicable relaxation as prescribed by the rules
Other Categories	Relaxation, wherever applicable, is governed by the latest UPSC examination rules.

ISS Selection Process

Written Examination

Candidates appear in the written examination carrying a maximum of 1000 marks.

Written Result

Candidates who qualify according to the applicable UPSC rules are considered for the next stage.

Viva Voce

Shortlisted candidates appear for Viva Voce carrying a maximum of 200 marks.

Final Merit

Final selection is based on the prescribed examination rules and aggregate performance in the written examination and Viva Voce.

ISS Exam Pattern

Paper	Subject	Marks	Duration	Type
Paper I	General English	100	3 Hours	Subjective
Paper II	General Studies	100	3 Hours	Subjective
Paper III	Statistics-I	200	2 Hours	Objective
Paper IV	Statistics-II	200	2 Hours	Objective
Paper V	Statistics-III	200	3 Hours	Descriptive
Paper VI	Statistics-IV	200	3 Hours	Descriptive
Written Examination	Total	1000	—	—
Viva Voce	Interview	200	—	Viva Voce

Important Exam Pattern Note

Statistics-I and Statistics-II are objective papers. Statistics-III and Statistics-IV are descriptive papers. General English and General Studies are subjective papers.

Statistics-I & Statistics-II

Paper	Questions	Marks	Time
Statistics-I	80 Objective Questions	200	120 Minutes
Statistics-II	80 Objective Questions	200	120 Minutes

Statistics-III & Statistics-IV

Statistics-III and Statistics-IV are descriptive papers. The papers include short-answer / small problem questions as well as long-answer and comprehension-type problem questions.

Paper	Type	Marks	Time
Statistics-III	Descriptive	200	3 Hours
Statistics-IV	Descriptive	200	3 Hours

Statistics-IV Choice

Statistics-IV contains seven sections. Candidates are required to choose any two sections as prescribed in the examination scheme. All sections carry equal marks.

General English

The General English paper tests the candidate's ability to understand and use English effectively.

Area	Preparation Focus
Essay Writing	Clear structure, logical arguments, relevant examples and correct language.
Precis Writing	Understanding the passage, identifying key ideas and writing concisely.
Grammar	Sentence structure, usage, common grammatical errors and correct expression.
Comprehension	Reading passages and answering questions based on the given text.

General Studies

Subject Area	Important Topics
Current Affairs	Important national and international developments.
Indian History	Major events, developments and important aspects of Indian history.
Geography	Indian and world geography, physical features and resources.
Polity	Constitution, governance, institutions and public administration.
Economy	Basic Indian economy, development, government policies and current economic developments.
Science & Technology	Important developments in science, technology and their applications.
Environment	Environmental issues, climate, conservation and sustainable development.

ISS Subjects

Category	Subjects
General Papers	General English, General Studies
Statistics Papers	Statistics-I, Statistics-II, Statistics-III, Statistics-IV
Interview	Viva Voce (200 Marks)

Detailed Statistics Syllabus

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Probability

Probability theory, conditional probability, Bayes theorem, random variables, probability distributions, expectation and variance.

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Statistical Inference

Estimation, hypothesis testing, confidence interval, sampling distributions, likelihood methods.

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Linear Models

Regression analysis, correlation, ANOVA, experimental design, generalized linear models.

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Sampling Theory

Random sampling, stratified sampling, systematic sampling, cluster sampling, ratio estimation.

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Statistical Computing

Numerical methods, statistical software concepts, data analysis, computational statistics.

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Official Syllabus

Prepare every topic according to the latest UPSC ISS syllabus and notification.

Recommended Books

Subject	Recommended Books
Probability	Sheldon Ross – A First Course in Probability
Statistical Inference	Casella & Berger – Statistical Inference
Sampling Theory	Sukhatme & Sukhatme
Linear Models	Montgomery – Design and Analysis of Experiments
General English	Wren & Martin, Previous Year Papers
General Studies	NCERT, Indian Polity by M. Laxmikanth, Current Affairs

Is NCERT Required?

NCERT books are useful mainly for General Studies. Technical Statistics preparation should be based on standard university-level statistics books.

Recommendation

Study NCERT only for strengthening General Studies concepts. For Statistics papers, rely on standard reference books, class notes, PYQs and mock tests.

Previous Year Questions (PYQs)

Solving previous year question papers is one of the most important parts of ISS preparation.

Understand UPSC question pattern.
Identify repeated concepts.
Improve numerical solving speed.
Build confidence for descriptive papers.
Improve answer writing quality.

ISS Preparation Strategy

Understand the Syllabus

Start by downloading and carefully studying the latest UPSC ISS syllabus. Divide every topic into small, manageable sections.

Build Statistics Fundamentals

Strengthen concepts in probability, statistical inference, sampling, regression, mathematical statistics and other core areas.

Follow Standard Books

Select one or two reliable books for each major topic instead of collecting too many study materials.

Solve PYQs

Solve previous year questions topic-wise and later attempt complete papers under examination conditions.

Practice Numericals

Statistics requires regular numerical practice. Maintain a separate formula and problem-solving notebook.

Regular Revision

Revise formulas, definitions, important results and frequently repeated concepts at regular intervals.

ISS Daily Study Plan

Study Session	Suggested Work
Session 1	Statistics concept study and theoretical understanding.
Session 2	Numerical and problem-solving practice.
Session 3	General Studies and current affairs.
Session 4	General English, writing and comprehension practice.
Session 5	PYQs, revision and error analysis.

Study Rule

The exact number of study hours should be adjusted according to your academic level, available time and examination schedule. Consistency is more important than simply increasing study hours.

Mock Tests for ISS

Mock tests should be an important part of ISS preparation, especially after completing the basic concepts.

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Topic Tests

Attempt small tests after completing individual topics.

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Time Management

Practice solving questions within the actual paper time.

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Analyse Mistakes

Record incorrect answers and revise the concepts responsible for the mistakes.

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Full-Length Tests

Attempt complete papers regularly during the final preparation phase.

Preparation for Descriptive Statistics Papers

Statistics-III and Statistics-IV require descriptive answer writing and problem solving. Candidates should therefore practise presenting solutions in a clear and logically ordered manner.

Write the relevant formula before starting the calculation.
Show important intermediate steps.
Keep calculations neat and readable.
Mention assumptions wherever required.
Clearly state the final result.
Practise questions within the prescribed time limit.

General English Preparation

Area	What to Practise
Essay	Introduction, logical arguments, examples, conclusion and language.
Precis	Identify the central idea and express it concisely.
Grammar	Sentence construction, grammatical accuracy and usage.
Comprehension	Regular reading practice and passage-based questions.

General Studies Preparation

General Studies should be prepared systematically. Focus on basic concepts first and then connect them with current events.

History

Study important developments of Indian history and revise them through short notes.

Geography

Focus on physical geography, Indian geography, resources and important geographical developments.

Polity

Understand the Constitution, institutions, governance and important current issues.

Economy

Prepare basic economic concepts along with important current economic developments.

Environment

Cover environmental issues, conservation, climate change and sustainable development.

Current Affairs

Follow reliable current-affairs sources and revise important national and international developments.

Documents Required

Matriculation / Class 10 certificate for date-of-birth proof.
Educational qualification documents.
Valid identity document as required.
Category certificate, wherever applicable.
PwBD certificate, wherever applicable.
Recent photograph and signature as required during online application.
Other documents specified in the latest UPSC notification.

Important

The exact document requirements can vary according to the application process and candidate category. Follow the latest UPSC instructions carefully.

How to Apply for ISS

Check Notification

Read the latest UPSC IES/ISS examination notification carefully before starting the application.

Register Online

Complete the registration process through the official UPSC online application system.

Fill Application Form

Enter personal, educational and other required information carefully.

Upload Documents

Upload the photograph, signature and other documents in the prescribed format wherever required.

Pay Fee

Pay the applicable examination fee according to the latest UPSC rules and candidate category.

Final Submit

Verify all details carefully and submit the application before the prescribed deadline.

ISS Application Fee

Candidate Category	Fee
General / OBC / EWS	As prescribed in the latest UPSC notification
Female Candidates	Fee exemption as prescribed by UPSC rules
SC / ST / PwBD	Fee exemption as prescribed by UPSC rules

Fee Notice

Always check the current UPSC notification for the exact application fee and exemption rules applicable to the examination year.

ISS Admit Card

UPSC releases the admit card / e-Admit Card for eligible candidates before the written examination.

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Download Online

Candidates should download the admit card from the official UPSC website when it is released.

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Check Details

Verify name, roll number, examination centre, date, timing and instructions.

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Carry Required ID

Carry the required identity document and other items specified in the examination instructions.

ISS Exam Day Instructions

Reach the examination centre well before the reporting time.
Carry the required e-Admit Card.
Carry the permitted identity document.
Read all examination instructions before attempting the paper.
Do not carry prohibited electronic devices or other restricted items.
Follow all instructions issued by UPSC and the examination centre.

ISS Result

UPSC publishes examination results on its official website. Candidates should regularly check the official UPSC website for written examination results, interview-related information and final results.

📝

Written Result

Candidates can check whether they have qualified for the next stage according to the result notice.

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Viva Voce

Candidates shortlisted according to UPSC rules are called for the interview / Viva Voce stage.

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Final Result

The final result is issued after completion of the prescribed selection process.

ISS Viva Voce

The Viva Voce is an important part of the final selection process. Candidates should be prepared to discuss their academic background, statistics, current developments and issues related to their field.

Area	Preparation
Academic Background	Revise Statistics concepts, important formulas and university-level subjects.
Current Affairs	Follow important developments related to statistics, economy, government data and national issues.
Communication	Practise clear, concise and confident answers.
Personal Questions	Prepare questions related to education, interests, background and career goals.

ISS Career and Job Profile

ISS officers form part of the Central Government statistical system. Their work can involve statistical analysis, data interpretation, survey-related activities, statistical reporting and other responsibilities assigned by the concerned government organisation.

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Statistical Analysis

Analyse statistical information and support evidence-based government work.

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Data & Surveys

Work related to statistical surveys, data collection, processing and analysis.

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Statistical Reporting

Preparation, interpretation and use of statistical reports and information.

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Government Service

Opportunities to work in government departments and organisations where statistical expertise is required.

ISS Salary

ISS officers receive salary and allowances according to the applicable Central Government pay rules and the post/level of appointment.

Salary Information

Exact salary, allowances, deductions and benefits can depend on the applicable government pay rules, posting and other service conditions. Candidates should check the latest official service rules for exact figures.

Important ISS Preparation Tips

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Follow the Official Syllabus

Do not prepare random topics. Keep the latest UPSC syllabus in front of you and complete every listed area systematically.

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Use Limited Study Material

Select reliable standard books and revise them repeatedly instead of collecting multiple overlapping sources.

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Practise Statistics Daily

Regular numerical practice is essential. Solve problems every day and maintain a separate notebook for formulas and mistakes.

⏰

Improve Speed

Practise questions with a timer so that you can complete objective and descriptive papers within the prescribed time.

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Practise Written Answers

For descriptive papers, practise writing complete solutions with formulas, calculations, explanations and conclusions.

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Revise Regularly

Revision should be a continuous process. Revisit difficult topics and previously incorrect questions regularly.

Common Mistakes to Avoid

Preparing Statistics without following the official syllabus.
Depending entirely on one source for every subject.
Ignoring General English and General Studies.
Avoiding previous year question papers.
Studying theory without sufficient numerical practice.
Ignoring descriptive answer-writing practice.
Starting mock tests only a few days before the examination.
Not analysing mistakes after a mock test.
Ignoring current affairs relevant to statistics, economy, government data and public policy.

One-Year ISS Preparation Plan

Phase	Focus
Months 1–3	Build fundamentals and cover important Statistics concepts.
Months 4–6	Complete major syllabus areas and begin topic-wise PYQs.
Months 7–9	Intensive problem solving, descriptive practice and revision.
Months 10–11	Full-length tests, PYQs, revision and weakness correction.
Month 12	Final revision, mock tests, formulas and important notes.

Three-Month Intensive Plan

Month 1

Complete important concepts and identify weak areas using previous year questions.

Month 2

Increase numerical practice, descriptive answer writing and full-topic revision.

Month 3

Focus on full-length papers, mock tests, revision and time management.

ISS Frequently Asked Questions

What is ISS?

ISS stands for Indian Statistical Service. Recruitment to the service is made through the UPSC Indian Economic Service - Indian Statistical Service Examination.

Is ISS conducted by UPSC?

Yes. The Indian Economic Service - Indian Statistical Service Examination is conducted by the Union Public Service Commission.

What educational qualification is required for ISS?

The eligibility rules include specified Bachelor's or Master's level qualifications in Statistics, Mathematical Statistics or Applied Statistics, subject to the conditions in the latest UPSC notification.

Is Statistics compulsory for ISS?

Yes. ISS is a specialised statistical service, so the prescribed educational qualification in Statistics, Mathematical Statistics or Applied Statistics is essential.

How many marks is the ISS written examination?

The written examination carries 1000 marks. Viva Voce carries an additional 200 marks.

Are Statistics papers objective or descriptive?

Statistics-I and Statistics-II are objective papers, while Statistics-III and Statistics-IV are descriptive papers.

Is NCERT enough for ISS?

No. NCERT can help with General Studies fundamentals, but it is not sufficient for the specialised Statistics papers. Standard Statistics books and university-level preparation are required.

Are previous year papers important?

Yes. PYQs help candidates understand the UPSC question style, identify important concepts and improve examination strategy.

Is there an interview for ISS?

Yes. Candidates qualifying for the final stage appear for Viva Voce as prescribed by UPSC.

Where should I check the latest ISS notification?

Candidates should check the official UPSC website for the latest notification, syllabus, dates, application instructions, admit card and results.

Official Website

Final Preparation Advice

ISS is a specialised competitive examination. Candidates should give the highest priority to the Statistics syllabus while maintaining consistent preparation for General English and General Studies.

Build strong fundamentals, solve previous year papers, practise numerical problems regularly, improve descriptive answer writing and revise systematically.

Remember

Always use the latest UPSC notification as the final authority for eligibility, dates, syllabus, vacancies, fee, examination rules and other official conditions.

ISS क्या है?

Indian Statistical Service (ISS) यानी भारतीय सांख्यिकी सेवा, केंद्र सरकार की एक विशेष सांख्यिकीय सेवा है। इसमें भर्ती संघ लोक सेवा आयोग (UPSC) द्वारा आयोजित Indian Economic Service - Indian Statistical Service Examination के माध्यम से की जाती है।

यह परीक्षा उन उम्मीदवारों के लिए है जिनके पास Statistics, Mathematical Statistics या Applied Statistics में निर्धारित शैक्षणिक योग्यता है।

ISS अधिकारी सरकारी सांख्यिकीय और विश्लेषणात्मक कार्यों में महत्वपूर्ण भूमिका निभाते हैं। उनके कार्यों में सांख्यिकीय जानकारी का संग्रह, संकलन, विश्लेषण, व्याख्या और रिपोर्टिंग से संबंधित जिम्मेदारियां शामिल हो सकती हैं।

ISS का Full Form

नाम	विवरण
ISS	Indian Statistical Service (भारतीय सांख्यिकी सेवा)
परीक्षा	Indian Economic Service - Indian Statistical Service Examination
आयोजन संस्था	Union Public Service Commission (UPSC)

ISS 2026 की महत्वपूर्ण जानकारी

विवरण	जानकारी
परीक्षा का नाम	Indian Economic Service - Indian Statistical Service Examination, 2026
आयोजन संस्था	संघ लोक सेवा आयोग (UPSC)
ISS रिक्तियां	2026 परीक्षा में 28 रिक्तियां
Notification Date	11 फरवरी 2026
परीक्षा तिथि	19 जून 2026
परीक्षा का तरीका	लिखित परीक्षा के बाद Viva Voce
लिखित परीक्षा	1000 अंक
Viva Voce	200 अंक

महत्वपूर्ण

रिक्तियां, परीक्षा तिथि, पात्रता और अन्य नियम हर भर्ती वर्ष में बदल सकते हैं। आवेदन करने से पहले नवीनतम UPSC Notification अवश्य देखें।

ISS के लिए पात्रता

उम्मीदवार को शैक्षणिक योग्यता, आयु, राष्ट्रीयता और अन्य सभी निर्धारित शर्तों को पूरा करना आवश्यक है।

पात्रता	विवरण
शैक्षणिक योग्यता	मान्यता प्राप्त विश्वविद्यालय/ संस्थान से Bachelor's Degree में Statistics, Mathematical Statistics या Applied Statistics निर्धारित शर्तों के अनुसार होना चाहिए, अथवा Statistics, Mathematical Statistics या Applied Statistics में Master's Degree होनी चाहिए।
Bachelor's Degree में Statistics	Bachelor's Degree के आधार पर पात्रता प्राप्त करने के लिए Statistics से संबंधित अध्ययन नवीनतम परीक्षा नियमों में दी गई शर्तों को पूरा करना चाहिए।
आयु	सामान्यतः उम्मीदवार की आयु निर्धारित भर्ती वर्ष में 21 से 30 वर्ष के बीच होनी चाहिए। आरक्षित वर्गों को नियमानुसार आयु में छूट मिल सकती है।
राष्ट्रीयता	उम्मीदवार को UPSC द्वारा निर्धारित राष्ट्रीयता संबंधी शर्तों को पूरा करना होगा।
अन्य शर्तें	उम्मीदवार को परीक्षा के लिए लागू अन्य सभी नियमों और शर्तों को पूरा करना होगा।

ISS शैक्षणिक योग्यता

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Bachelor's Degree

Bachelor's Degree में Statistics, Mathematical Statistics या Applied Statistics विषय होना चाहिए और यह नवीनतम UPSC नियमों में दी गई शर्तों को पूरा करना चाहिए।

📊

Master's Degree

Statistics, Mathematical Statistics या Applied Statistics में मान्यता प्राप्त विश्वविद्यालय/संस्थान से Master's Degree भी पात्रता का एक मार्ग है।

⚠️

महत्वपूर्ण योग्यता नियम

केवल किसी छोटे हिस्से में Statistics पढ़ना पर्याप्त हो, यह जरूरी नहीं है। Bachelor's Degree वाले उम्मीदवार को नवीनतम UPSC Notification में दी गई Statistics संबंधी शर्तों को ध्यान से देखना चाहिए।

📋

अंतिम वर्ष के उम्मीदवार

कुछ परिस्थितियों में qualifying examination में उपस्थित उम्मीदवार provisional रूप से आवेदन कर सकते हैं, लेकिन उन्हें UPSC द्वारा निर्धारित प्रमाण और शर्तों को पूरा करना होगा।

महत्वपूर्ण योग्यता नोट

2026 ISS परीक्षा के लिए Bachelor's Degree वाले मार्ग में Statistics के अध्ययन से संबंधित विशेष शर्तें दी गई हैं। इसलिए आवेदन करने से पहले नवीनतम UPSC Notification को ध्यानपूर्वक पढ़ना जरूरी है।

ISS Age Limit

वर्ग	आयु सीमा
न्यूनतम आयु	21 वर्ष
अधिकतम आयु	सामान्य आयु सीमा 30 वर्ष, जैसा कि 2026 परीक्षा के लिए लागू है
SC / ST	लागू सरकारी नियमों के अनुसार ऊपरी आयु सीमा में छूट
OBC	लागू सरकारी नियमों के अनुसार ऊपरी आयु सीमा में छूट
PwBD	लागू नियमों के अनुसार आयु में छूट
अन्य वर्ग	जहां लागू हो, नवीनतम UPSC नियमों के अनुसार छूट दी जाएगी।

ISS Selection Process

लिखित परीक्षा

उम्मीदवार 1000 अंकों की लिखित परीक्षा में शामिल होते हैं।

Written Result

लागू UPSC नियमों के अनुसार qualifying उम्मीदवार अगले चरण के लिए चुने जाते हैं।

Viva Voce

निर्धारित प्रक्रिया के अनुसार shortlisted उम्मीदवार 200 अंकों के Viva Voce में शामिल होते हैं।

Final Merit

लिखित परीक्षा और Viva Voce में प्रदर्शन के आधार पर लागू नियमों के अनुसार अंतिम चयन किया जाता है।

ISS Exam Pattern

पेपर	विषय	अंक	समय	प्रकार
Paper I	General English	100	3 घंटे	Subjective
Paper II	General Studies	100	3 घंटे	Subjective
Paper III	Statistics-I	200	2 घंटे	Objective
Paper IV	Statistics-II	200	2 घंटे	Objective
Paper V	Statistics-III	200	3 घंटे	Descriptive
Paper VI	Statistics-IV	200	3 घंटे	Descriptive
Written Examination	कुल	1000	—	—
Viva Voce	Interview	200	—	Viva Voce

महत्वपूर्ण Exam Pattern Note

Statistics-I और Statistics-II objective papers हैं, जबकि Statistics-III और Statistics-IV descriptive papers हैं। General English और General Studies subjective papers हैं।

Statistics-I और Statistics-II

पेपर	प्रश्न	अंक	समय
Statistics-I	80 Objective Questions	200	120 मिनट
Statistics-II	80 Objective Questions	200	120 मिनट

Statistics-III और Statistics-IV

Statistics-III और Statistics-IV descriptive papers हैं। इन papers में short-answer / small problem questions तथा long-answer और comprehension-type problem questions शामिल हो सकते हैं।

पेपर	प्रकार	अंक	समय
Statistics-III	Descriptive	200	3 घंटे
Statistics-IV	Descriptive	200	3 घंटे

Statistics-IV में विकल्प

Statistics-IV में सात sections होते हैं। उम्मीदवारों को examination scheme के अनुसार इनमें से किसी दो sections का चुनाव करना होता है। सभी sections समान अंकों के होते हैं।

General English

General English paper उम्मीदवार की English को समझने और प्रभावी रूप से उपयोग करने की क्षमता को जांचता है।

क्षेत्र	तैयारी
Essay Writing	स्पष्ट structure, तार्किक arguments, relevant examples और सही language पर ध्यान दें।
Precis Writing	Passage की मुख्य बात समझकर उसे संक्षेप में लिखने का अभ्यास करें।
Grammar	Sentence structure, grammar और सही usage का अभ्यास करें।
Comprehension	Passage पढ़कर उससे संबंधित प्रश्नों के उत्तर देने का अभ्यास करें।

General Studies

विषय	महत्वपूर्ण क्षेत्र
Current Affairs	महत्वपूर्ण राष्ट्रीय और अंतरराष्ट्रीय घटनाएं।
भारतीय इतिहास	भारतीय इतिहास की प्रमुख घटनाएं और महत्वपूर्ण विकास।
Geography	भारत और विश्व का भूगोल, भौतिक विशेषताएं और संसाधन।
Polity	संविधान, शासन, संस्थाएं और प्रशासन से संबंधित विषय।
Economy	भारतीय अर्थव्यवस्था, विकास, सरकारी नीतियां और वर्तमान आर्थिक घटनाक्रम।
Science & Technology	विज्ञान, तकनीक और उनके महत्वपूर्ण अनुप्रयोग।
Environment	पर्यावरण, जलवायु, संरक्षण और sustainable development।

ISS तैयारी की रणनीति

Syllabus को समझें

सबसे पहले नवीनतम UPSC ISS syllabus को ध्यानपूर्वक पढ़ें। प्रत्येक topic को छोटे और manageable sections में बांटकर तैयारी करें।

Statistics की मजबूत नींव बनाएं

Probability, Statistical Inference, Sampling, Regression, Mathematical Statistics और अन्य महत्वपूर्ण topics के concepts को मजबूत करें।

Standard Books पढ़ें

प्रत्येक प्रमुख topic के लिए एक या दो भरोसेमंद standard books चुनें। बहुत अधिक study material इकट्ठा करने से बचें।

Previous Year Questions हल करें

पहले topic-wise PYQs हल करें और syllabus पूरा होने के बाद पूरे papers को निर्धारित समय में हल करने का अभ्यास करें।

Numerical Practice करें

Statistics में नियमित numerical practice बहुत जरूरी है। Formula और problem-solving के लिए अलग notebook बनाएं।

नियमित Revision करें

Formulas, definitions, important results और बार-बार पूछे जाने वाले concepts को नियमित रूप से revise करें।

ISS Daily Study Plan

अध्ययन सत्र	क्या करें
Session 1	Statistics के concepts पढ़ें और theoretical understanding मजबूत करें।
Session 2	Numerical और problem-solving questions का अभ्यास करें।
Session 3	General Studies और Current Affairs की तैयारी करें।
Session 4	General English, writing और comprehension का अभ्यास करें।
Session 5	PYQs, revision और गलतियों का analysis करें।

Study Rule

रोज कितने घंटे पढ़ना है, यह आपकी academic level, उपलब्ध समय और examination schedule के अनुसार तय करें। केवल study hours बढ़ाना जरूरी नहीं है; consistency अधिक महत्वपूर्ण है।

ISS Mock Test की तैयारी

Basic concepts पूरे करने के बाद mock tests को अपनी तैयारी का महत्वपूर्ण हिस्सा बनाएं।

📝

Topic Tests

किसी topic को पूरा करने के बाद उस topic से संबंधित छोटा test दें।

⏱️

Time Management

निर्धारित समय के अंदर questions हल करने का अभ्यास करें।

📊

गलतियों का Analysis

गलत questions को लिखकर रखें और उन गलतियों से जुड़े concepts को दोबारा revise करें।

🔄

Full-Length Tests

Final preparation के दौरान पूरे papers को वास्तविक परीक्षा जैसी परिस्थितियों में हल करें।

Descriptive Statistics Papers की तैयारी

Statistics-III और Statistics-IV descriptive papers हैं। इसलिए solutions को साफ, क्रमबद्ध और logically प्रस्तुत करने का अभ्यास करना चाहिए।

Calculation शुरू करने से पहले relevant formula लिखें।
महत्वपूर्ण intermediate steps दिखाएं।
Calculations साफ और readable रखें।
जहां आवश्यक हो, assumptions लिखें।
Final result को स्पष्ट रूप से लिखें।
निर्धारित समय के अंदर questions हल करने का अभ्यास करें।

General English की तैयारी

क्षेत्र	क्या अभ्यास करें
Essay	Introduction, logical arguments, examples, conclusion और सही language का अभ्यास करें।
Precis	Passage की मुख्य बात पहचानकर उसे संक्षेप में लिखने का अभ्यास करें।
Grammar	Sentence construction, grammatical accuracy और correct usage पर ध्यान दें।
Comprehension	नियमित reading और passage-based questions का अभ्यास करें।

General Studies की तैयारी

General Studies में पहले basic concepts को मजबूत करें और उसके बाद उन्हें Current Affairs से जोड़कर पढ़ें।

History

भारतीय इतिहास की महत्वपूर्ण घटनाओं और प्रमुख developments का अध्ययन करें।

Geography

Physical Geography, Indian Geography, resources और महत्वपूर्ण geographical developments पढ़ें।

Polity

संविधान, सरकारी संस्थाओं, governance और महत्वपूर्ण current issues को समझें।

Economy

Basic economic concepts के साथ महत्वपूर्ण current economic developments पढ़ें।

Environment

Environmental issues, conservation, climate change और sustainable development पर ध्यान दें।

Current Affairs

विश्वसनीय sources से national और international developments पढ़ें और नियमित revision करें।

ISS के लिए आवश्यक Documents

Date of Birth proof के लिए Matriculation / Class 10 certificate।
Educational Qualification से संबंधित certificates और documents।
आवश्यक Valid Identity Document।
जहां लागू हो, Category Certificate।
जहां लागू हो, PwBD Certificate।
Online application में मांगी गई Photograph और Signature।
नवीनतम UPSC Notification में बताए गए अन्य आवश्यक documents।

महत्वपूर्ण

Exact document requirements application process और candidate category के अनुसार अलग हो सकती हैं। इसलिए latest UPSC instructions को ध्यान से पढ़ें।

ISS के लिए Online Apply कैसे करें?

Notification पढ़ें

आवेदन शुरू करने से पहले latest UPSC IES/ISS examination notification को ध्यानपूर्वक पढ़ें।

Online Registration

Official UPSC online application system के माध्यम से registration process पूरा करें।

Application Form भरें

Personal, educational और अन्य आवश्यक जानकारी सही-सही भरें।

Documents Upload करें

जहां आवश्यक हो, Photograph, Signature और अन्य documents को निर्धारित format में upload करें।

Fee जमा करें

Candidate category के अनुसार लागू examination fee जमा करें।

Final Submit करें

सभी details verify करने के बाद अंतिम तिथि से पहले application submit करें।

ISS Application Fee

Candidate Category	Fee
General / OBC / EWS	नवीनतम UPSC Notification के अनुसार लागू शुल्क
Female Candidates	UPSC के लागू नियमों के अनुसार fee exemption
SC / ST / PwBD	UPSC के लागू नियमों के अनुसार fee exemption

Fee से संबंधित महत्वपूर्ण सूचना

Exact application fee और exemption rules recruitment year के अनुसार latest UPSC notification से verify करें।

ISS Admit Card

UPSC eligible candidates के लिए examination से पहले e-Admit Card जारी करता है। Candidate को official UPSC website से इसे download करना चाहिए।

📄

Online Download

Admit Card जारी होने के बाद इसे official UPSC website से download करें।

🔎

Details Check करें

Name, Roll Number, Examination Centre, Date, Time और instructions को ध्यानपूर्वक check करें।

🪪

Required ID रखें

Examination instructions के अनुसार आवश्यक identity document और अन्य permitted items साथ रखें।

ISS Exam Day Instructions

Reporting time से काफी पहले examination centre पर पहुंचें।
अपना e-Admit Card साथ लेकर जाएं।
निर्धारित Identity Document साथ रखें।
Paper शुरू करने से पहले सभी examination instructions ध्यान से पढ़ें।
Prohibited electronic devices या restricted items examination centre पर न ले जाएं।
UPSC और examination centre के सभी instructions का पालन करें।

ISS Result

UPSC examination results को अपनी official website पर जारी करता है। Candidates को written examination result, Viva Voce से संबंधित information और final result के लिए official UPSC website check करते रहना चाहिए।

📝

Written Result

Result notice के अनुसार candidate यह देख सकता है कि वह अगले चरण के लिए qualify हुआ है या नहीं।

🎤

Viva Voce

UPSC rules के अनुसार shortlisted candidates interview / Viva Voce stage में शामिल होते हैं।

🏆

Final Result

Prescribed selection process पूरा होने के बाद final result जारी किया जाता है।

ISS Viva Voce

Viva Voce final selection process का महत्वपूर्ण हिस्सा है। Candidate को अपने academic background, Statistics, current developments और अपने field से जुड़े महत्वपूर्ण मुद्दों पर प्रश्नों के लिए तैयार रहना चाहिए।

क्षेत्र	तैयारी
Academic Background	Statistics concepts, important formulas और university-level subjects revise करें।
Current Affairs	Statistics, economy, government data और national issues से संबंधित महत्वपूर्ण developments पढ़ें।
Communication	Clear, concise और confident answers देने का अभ्यास करें।
Personal Questions	Education, interests, background और career goals से संबंधित questions के लिए तैयार रहें।

ISS Career और Job Profile

ISS officers Central Government के statistical system का हिस्सा होते हैं। उनके कार्यों में statistical analysis, data interpretation, surveys, statistical reporting और संबंधित government organisation द्वारा दिए गए अन्य statistical responsibilities शामिल हो सकते हैं।

📊

Statistical Analysis

Statistical information का analysis करना और evidence-based government work में सहायता करना।

📋

Data और Surveys

Statistical surveys, data collection, processing और analysis से संबंधित कार्य करना।

📈

Statistical Reporting

Statistical reports और information की preparation, interpretation और use से संबंधित कार्य।

🏛️

Government Service

ऐसे government departments और organisations में कार्य करने का अवसर जहां statistical expertise की आवश्यकता होती है।

ISS Salary

ISS officers को Central Government के लागू pay rules तथा नियुक्त post/level के अनुसार salary और allowances मिलते हैं।

Salary Information

Exact salary, allowances, deductions और benefits applicable government pay rules, posting और service conditions पर निर्भर कर सकते हैं। Exact figures के लिए latest official service rules देखें।

ISS तैयारी की रणनीति

Syllabus को समझें

Statistics की मजबूत नींव बनाएं

Probability, Statistical Inference, Sampling, Regression, Mathematical Statistics और अन्य महत्वपूर्ण topics के concepts को मजबूत करें।

Standard Books पढ़ें

Previous Year Questions हल करें

Numerical Practice करें

Statistics में नियमित numerical practice बहुत जरूरी है। Formula और problem-solving के लिए अलग notebook बनाएं।

नियमित Revision करें

Formulas, definitions, important results और बार-बार पूछे जाने वाले concepts को नियमित रूप से revise करें।

ISS Daily Study Plan

अध्ययन सत्र	क्या करें
Session 1	Statistics के concepts पढ़ें और theoretical understanding मजबूत करें।
Session 2	Numerical और problem-solving questions का अभ्यास करें।
Session 3	General Studies और Current Affairs की तैयारी करें।
Session 4	General English, writing और comprehension का अभ्यास करें।
Session 5	PYQs, revision और गलतियों का analysis करें।

Study Rule

ISS Mock Test की तैयारी

Basic concepts पूरे करने के बाद mock tests को अपनी तैयारी का महत्वपूर्ण हिस्सा बनाएं।

📝

Topic Tests

किसी topic को पूरा करने के बाद उस topic से संबंधित छोटा test दें।

⏱️

Time Management

निर्धारित समय के अंदर questions हल करने का अभ्यास करें।

📊

गलतियों का Analysis

गलत questions को लिखकर रखें और उन गलतियों से जुड़े concepts को दोबारा revise करें।

🔄

Full-Length Tests

Final preparation के दौरान पूरे papers को वास्तविक परीक्षा जैसी परिस्थितियों में हल करें।

Descriptive Statistics Papers की तैयारी

Calculation शुरू करने से पहले relevant formula लिखें।
महत्वपूर्ण intermediate steps दिखाएं।
Calculations साफ और readable रखें।
जहां आवश्यक हो, assumptions लिखें।
Final result को स्पष्ट रूप से लिखें।
निर्धारित समय के अंदर questions हल करने का अभ्यास करें।

General English की तैयारी

क्षेत्र	क्या अभ्यास करें
Essay	Introduction, logical arguments, examples, conclusion और सही language का अभ्यास करें।
Precis	Passage की मुख्य बात पहचानकर उसे संक्षेप में लिखने का अभ्यास करें।
Grammar	Sentence construction, grammatical accuracy और correct usage पर ध्यान दें।
Comprehension	नियमित reading और passage-based questions का अभ्यास करें।

General Studies की तैयारी

General Studies में पहले basic concepts को मजबूत करें और उसके बाद उन्हें Current Affairs से जोड़कर पढ़ें।

History

भारतीय इतिहास की महत्वपूर्ण घटनाओं और प्रमुख developments का अध्ययन करें।

Geography

Physical Geography, Indian Geography, resources और महत्वपूर्ण geographical developments पढ़ें।

Polity

संविधान, सरकारी संस्थाओं, governance और महत्वपूर्ण current issues को समझें।

Economy

Basic economic concepts के साथ महत्वपूर्ण current economic developments पढ़ें।

Environment

Environmental issues, conservation, climate change और sustainable development पर ध्यान दें।

Current Affairs

विश्वसनीय sources से national और international developments पढ़ें और नियमित revision करें।

ISS के लिए आवश्यक Documents

Date of Birth proof के लिए Matriculation / Class 10 certificate।
Educational Qualification से संबंधित certificates और documents।
आवश्यक Valid Identity Document।
जहां लागू हो, Category Certificate।
जहां लागू हो, PwBD Certificate।
Online application में मांगी गई Photograph और Signature।
नवीनतम UPSC Notification में बताए गए अन्य आवश्यक documents।

महत्वपूर्ण

ISS के लिए Online Apply कैसे करें?

Notification पढ़ें

आवेदन शुरू करने से पहले latest UPSC IES/ISS examination notification को ध्यानपूर्वक पढ़ें।

Online Registration

Official UPSC online application system के माध्यम से registration process पूरा करें।

Application Form भरें

Personal, educational और अन्य आवश्यक जानकारी सही-सही भरें।

Documents Upload करें

जहां आवश्यक हो, Photograph, Signature और अन्य documents को निर्धारित format में upload करें।

Fee जमा करें

Candidate category के अनुसार लागू examination fee जमा करें।

Final Submit करें

सभी details verify करने के बाद अंतिम तिथि से पहले application submit करें।

ISS Application Fee

Candidate Category	Fee
General / OBC / EWS	नवीनतम UPSC Notification के अनुसार लागू शुल्क
Female Candidates	UPSC के लागू नियमों के अनुसार fee exemption
SC / ST / PwBD	UPSC के लागू नियमों के अनुसार fee exemption

Fee से संबंधित महत्वपूर्ण सूचना

Exact application fee और exemption rules recruitment year के अनुसार latest UPSC notification से verify करें।

ISS Admit Card

📄

Online Download

Admit Card जारी होने के बाद इसे official UPSC website से download करें।

🔎

Details Check करें

Name, Roll Number, Examination Centre, Date, Time और instructions को ध्यानपूर्वक check करें।

🪪

Required ID रखें

Examination instructions के अनुसार आवश्यक identity document और अन्य permitted items साथ रखें।

ISS Exam Day Instructions

Reporting time से काफी पहले examination centre पर पहुंचें।
अपना e-Admit Card साथ लेकर जाएं।
निर्धारित Identity Document साथ रखें।
Paper शुरू करने से पहले सभी examination instructions ध्यान से पढ़ें।
Prohibited electronic devices या restricted items examination centre पर न ले जाएं।
UPSC और examination centre के सभी instructions का पालन करें।

ISS Result

📝

Written Result

Result notice के अनुसार candidate यह देख सकता है कि वह अगले चरण के लिए qualify हुआ है या नहीं।

🎤

Viva Voce

UPSC rules के अनुसार shortlisted candidates interview / Viva Voce stage में शामिल होते हैं।

🏆

Final Result

Prescribed selection process पूरा होने के बाद final result जारी किया जाता है।

ISS Viva Voce

क्षेत्र	तैयारी
Academic Background	Statistics concepts, important formulas और university-level subjects revise करें।
Current Affairs	Statistics, economy, government data और national issues से संबंधित महत्वपूर्ण developments पढ़ें।
Communication	Clear, concise और confident answers देने का अभ्यास करें।
Personal Questions	Education, interests, background और career goals से संबंधित questions के लिए तैयार रहें।

ISS Career और Job Profile

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Statistical Analysis

Statistical information का analysis करना और evidence-based government work में सहायता करना।

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Data और Surveys

Statistical surveys, data collection, processing और analysis से संबंधित कार्य करना।

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Statistical Reporting

Statistical reports और information की preparation, interpretation और use से संबंधित कार्य।

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Government Service

ISS Salary

ISS officers को Central Government के लागू pay rules तथा नियुक्त post/level के अनुसार salary और allowances मिलते हैं।

Salary Information

ISS की तैयारी के महत्वपूर्ण Tips

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Official Syllabus को Follow करें

Random topics की तैयारी न करें। Latest UPSC syllabus को सामने रखकर प्रत्येक topic को systematically पूरा करें।

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Limited Study Material रखें

प्रत्येक subject के लिए भरोसेमंद standard books चुनें और उन्हें बार-बार revise करें। बहुत अधिक books इकट्ठी करने से बचें।

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रोज Statistics की Practice करें

Statistics में नियमित numerical practice जरूरी है। हर दिन problems solve करें और formulas तथा गलतियों के लिए अलग notebook बनाएं।

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Speed Improve करें

Timer लगाकर questions solve करने का अभ्यास करें ताकि examination में निर्धारित समय के अंदर paper पूरा किया जा सके।

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Written Answer Practice करें

Descriptive papers के लिए complete solutions लिखने का अभ्यास करें। Formula, calculation, explanation और conclusion को सही क्रम में लिखें।

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नियमित Revision करें

Revision को तैयारी का लगातार हिस्सा बनाएं। Difficult topics और पहले गलत किए गए questions को बार-बार revise करें।

ISS Preparation में होने वाली Common Mistakes

Official syllabus को देखे बिना Statistics की तैयारी शुरू करना।
हर subject के लिए बहुत ज्यादा study material और books इकट्ठी करना।
General English और General Studies को ignore करना।
Previous Year Question Papers को पर्याप्त महत्व न देना।
Theory पढ़ना लेकिन numerical practice पर्याप्त न करना।
Descriptive answer-writing की practice न करना।
Examination से कुछ दिन पहले ही mock tests शुरू करना।
Mock test के बाद गलतियों का analysis न करना।
Statistics, economy, government data और public policy से संबंधित current affairs को ignore करना।

One-Year ISS Preparation Plan

चरण	मुख्य Focus
Month 1–3	Statistics के fundamentals मजबूत करें और महत्वपूर्ण concepts पूरा करें।
Month 4–6	Major syllabus areas पूरा करें और topic-wise PYQs शुरू करें।
Month 7–9	Intensive problem solving, descriptive practice और revision करें।
Month 10–11	Full-length tests, PYQs, revision और weak areas को सुधारने पर focus करें।
Month 12	Final revision, mock tests, formulas और important notes को revise करें।

Three-Month Intensive ISS Plan

Month 1

Important concepts पूरा करें और Previous Year Questions की सहायता से अपने weak areas पहचानें।

Month 2

Numerical practice, descriptive answer writing और complete syllabus revision पर focus करें।

Month 3

Full-length papers, mock tests, revision और time management पर विशेष ध्यान दें।

ISS Recommended Books

ISS में Statistics सबसे महत्वपूर्ण हिस्सा है। इसलिए Statistics के लिए university-level standard books का उपयोग करें। नीचे preparation में commonly useful reference books दी गई हैं।

विषय	Recommended Books / Authors	उपयोग
Mathematical Statistics	Hogg, McKean & Craig	Probability और Mathematical Statistics के concepts मजबूत करने के लिए।
Statistical Inference	Casella & Berger	Estimation, Testing और Inference की advanced preparation के लिए।
Probability	Sheldon Ross	Probability concepts और numerical practice के लिए।
Regression / Linear Models	Montgomery, Peck & Vining	Regression और linear model concepts के लिए उपयोगी।
Sampling	Cochran	Sampling techniques और survey-related concepts के लिए।
General Studies	NCERT + Standard GS Reference	Basic concepts और General Studies foundation के लिए।
General English	Standard English Grammar / Writing Reference	Grammar, comprehension, précis और essay practice के लिए।

NCERT ISS के लिए कितनी जरूरी है?

NCERT को ISS की specialised Statistics preparation की मुख्य किताब नहीं माना जाना चाहिए। NCERT General Studies के basic concepts मजबूत करने में उपयोगी हो सकती है। Statistics papers के लिए standard university-level books और syllabus-based practice अधिक महत्वपूर्ण है।

ISS Previous Year Questions

Previous Year Question Papers ISS preparation में बहुत महत्वपूर्ण हैं। इनके माध्यम से UPSC के question pattern, difficulty level और frequently tested concepts को समझा जा सकता है।

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Topic-wise PYQ

पहले अलग-अलग topics के questions solve करें और अपने weak areas identify करें।

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Full Paper Practice

Syllabus पूरा होने के बाद complete previous year papers को निर्धारित समय में solve करें।

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PYQ Analysis

बार-बार पूछे गए concepts और अपनी गलतियों की list बनाकर revision करें।

ISS Mock Test कैसे दें?

शुरुआत में topic-wise tests दें।
Syllabus का बड़ा हिस्सा पूरा होने के बाद sectional tests दें।
Final preparation में full-length tests दें।
हर test को वास्तविक examination time के अनुसार attempt करें।
Test के बाद प्रत्येक गलत answer का analysis करें।
जिन topics में बार-बार गलती हो रही है, उन्हें दोबारा पढ़ें।

ISS Viva Voce की तैयारी

Viva Voce के लिए केवल Statistics ही नहीं, बल्कि अपने academic background और current developments की भी तैयारी करें।

क्षेत्र	क्या तैयार करें
Academic Background	Statistics के fundamental concepts, formulas और अपने graduation/post-graduation subjects revise करें।
Statistics	Important concepts, practical applications और statistical methods को समझें।
Current Affairs	Government data, economy, statistics और national issues से संबंधित current developments पढ़ें।
Personal Questions	Education, interests, background और career goals से संबंधित questions की तैयारी करें।
Communication	स्पष्ट, संक्षिप्त और confident तरीके से answer देने का अभ्यास करें।

ISS Frequently Asked Questions

ISS क्या है?

ISS का full form Indian Statistical Service है। यह केंद्र सरकार की specialised statistical service है और इसकी भर्ती UPSC द्वारा आयोजित IES/ISS Examination के माध्यम से होती है।

क्या ISS परीक्षा UPSC आयोजित करता है?

हां। Indian Economic Service - Indian Statistical Service Examination का आयोजन Union Public Service Commission (UPSC) द्वारा किया जाता है।

ISS के लिए कौन-सी Educational Qualification चाहिए?

निर्धारित eligibility के अनुसार Statistics, Mathematical Statistics या Applied Statistics में Bachelor's या Master's level की specified qualification आवश्यक होती है। Exact conditions latest UPSC notification में देखें।

क्या ISS के लिए Statistics जरूरी है?

हां। ISS एक specialised statistical service है, इसलिए prescribed educational qualification में Statistics, Mathematical Statistics या Applied Statistics की निर्धारित शर्त पूरी करना आवश्यक है।

ISS Written Examination कितने अंकों का होता है?

Written Examination 1000 अंकों का होता है। Viva Voce 200 अंकों का होता है।

ISS में Statistics papers Objective हैं या Descriptive?

Statistics-I और Statistics-II objective papers हैं, जबकि Statistics-III और Statistics-IV descriptive papers हैं।

क्या ISS के लिए NCERT पर्याप्त है?

नहीं। NCERT General Studies के basic concepts के लिए उपयोगी हो सकती है, लेकिन specialised Statistics papers के लिए NCERT पर्याप्त नहीं है। इसके लिए standard Statistics books और university-level preparation जरूरी है।

क्या Previous Year Papers जरूरी हैं?

हां। PYQs से UPSC का question pattern, difficulty level और important concepts समझने में मदद मिलती है।

क्या ISS में Interview होता है?

हां। Prescribed selection process के अनुसार qualifying candidates Viva Voce में शामिल होते हैं।

Latest ISS Notification कहां देखें?

Latest notification, syllabus, dates, application instructions, admit card और result के लिए official UPSC website देखें।

ISS Official Website

ISS की तैयारी के लिए अंतिम सलाह

ISS एक specialised competitive examination है। इसलिए preparation में सबसे अधिक priority Statistics syllabus को दें और साथ-साथ General English तथा General Studies की भी नियमित तैयारी करते रहें।

मजबूत fundamentals बनाएं, Previous Year Papers solve करें, numerical problems की नियमित practice करें, descriptive answer writing improve करें और systematic revision करते रहें।

हमेशा याद रखें

Eligibility, examination dates, vacancies, syllabus, fee, examination rules और अन्य official conditions के लिए हमेशा latest UPSC notification को final authority मानें।

Indian Statistical Service (ISS) — Complete Overview

The Indian Statistical Service (ISS) is a specialised Group 'A' service of the Government of India. Recruitment to the service is carried out through the UPSC Indian Economic Service / Indian Statistical Service Examination.

Full Form

Indian Statistical Service

Conducting Body

Union Public Service Commission (UPSC)

Service Type

Central Government Group 'A' Service

Examination

Indian Economic Service / Indian Statistical Service Examination

ISS Eligibility

Eligibility Area	Requirement
Educational Qualification	The candidate must satisfy the prescribed Statistics / Mathematical Statistics / Applied Statistics qualification specified in the latest UPSC notification.
Age Limit	The age limit and relaxations are governed by the latest UPSC examination notification.
Nationality	Nationality conditions are prescribed by UPSC and must be checked in the latest official notification.
Other Conditions	Candidates must fulfil all conditions mentioned in the official UPSC notification.

ISS Examination Pattern

Paper	Subject	Marks	Type
Paper I	General English	100	Descriptive
Paper II	General Studies	100	Descriptive
Paper III	Statistics-I	200	Objective
Paper IV	Statistics-II	200	Objective
Paper V	Statistics-III	200	Descriptive
Paper VI	Statistics-IV	200	Descriptive
Written Examination	Total	1000	—
Viva Voce	Interview	200	Interview

ISS Subjects

General English

Essay writing, précis, comprehension, grammar and effective written communication.

General Studies

General knowledge, current affairs, history, geography, polity, economy, science and other relevant areas.

Statistics-I

Core statistical concepts and topics prescribed in the official syllabus.

Statistics-II

Advanced statistical concepts and mathematical/statistical methods.

Statistics-III

Descriptive Statistics paper covering prescribed advanced topics.

Statistics-IV

Advanced applied and statistical methodology topics as prescribed by UPSC.

ISS Preparation Priority

Priority	Area	Preparation Focus
High	Statistics	Build strong concepts, solve numerical problems and practise PYQs.
High	Previous Year Papers	Understand the question pattern and practise under time limits.
Medium	General Studies	Build fundamentals and regularly revise current affairs.
Medium	General English	Practise essay, précis, comprehension and grammar.

ISS Recommended Books

Subject	Recommended Reference	Purpose
Probability	Sheldon Ross	Probability concepts and problem-solving practice.
Mathematical Statistics	Hogg, McKean & Craig	Mathematical Statistics and advanced concepts.
Statistical Inference	Casella & Berger	Estimation, testing and statistical inference.
Sampling	Cochran	Sampling theory and survey-related concepts.
Regression / Linear Models	Montgomery, Peck & Vining	Regression analysis and linear models.
General Studies	NCERT + Standard GS Sources	Basic concepts and foundation for General Studies.
General English	Standard English Grammar and Writing Reference	Grammar, comprehension, précis and essay practice.

Is NCERT Useful for ISS?

NCERT books can be useful for building basic understanding for General Studies. However, NCERT books alone are not sufficient for the specialised Statistics papers of the ISS examination.

Important

For Statistics papers, candidates should follow the official UPSC syllabus and use appropriate university-level Statistics references, previous year papers and regular numerical practice.

ISS Selection Process

Written Examination

Candidates appear for the prescribed written examination conducted by UPSC.

Written Result

Candidates meeting the prescribed criteria proceed to the next stage.

Viva Voce

Shortlisted candidates appear for the prescribed interview / Viva Voce.

Final Result

Final selection is made according to the applicable UPSC rules and merit.

ISS Career Opportunities

An ISS officer works in the Central Government statistical system and may be involved in statistical analysis, data interpretation, surveys, statistical reporting and other responsibilities assigned by the concerned government organisation.

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Statistical Analysis

Analysis and interpretation of statistical information.

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Surveys & Data

Work related to statistical surveys, data collection and processing.

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Statistical Reporting

Preparation and interpretation of statistical reports.

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Government Service

Opportunities to work in government departments requiring statistical expertise.

Important ISS Preparation Tips

Follow the latest official UPSC syllabus instead of preparing random topics.
Build strong fundamentals in Statistics.
Practise numerical questions regularly.
Solve previous year question papers.
Develop descriptive answer-writing skills.
Do not ignore General English and General Studies.
Analyse mistakes after every mock test.
Revise formulas and difficult concepts regularly.
Follow the latest official notification for all eligibility and examination rules.

ISS Frequently Asked Questions

What is ISS?

ISS stands for Indian Statistical Service. It is a specialised Central Government statistical service recruited through the UPSC IES/ISS Examination.

Who conducts the ISS examination?

The Indian Economic Service / Indian Statistical Service Examination is conducted by the Union Public Service Commission (UPSC).

Is Statistics compulsory for ISS?

Candidates must satisfy the prescribed educational qualification involving Statistics, Mathematical Statistics or Applied Statistics as specified in the latest UPSC notification.

How many marks is the ISS written examination?

The written examination is of 1000 marks and the Viva Voce is of 200 marks.

Are Statistics papers objective or descriptive?

Statistics-I and Statistics-II are objective papers, while Statistics-III and Statistics-IV are descriptive papers.

Is NCERT enough for ISS?

No. NCERT can help with General Studies fundamentals, but specialised Statistics papers require syllabus-based and university-level preparation.

Are Previous Year Papers important?

Yes. PYQs help candidates understand the examination pattern, important concepts, difficulty level and time-management requirements.

Where should I check the latest ISS notification?

Candidates should check the official UPSC website for the latest notification, syllabus, dates, application instructions, admit card and result.

Official UPSC Website

Final Preparation Advice

ISS is a specialised competitive examination. Give maximum priority to the Statistics syllabus while maintaining regular preparation for General English and General Studies.

Build strong fundamentals, practise numerical problems, solve previous year papers, improve descriptive answer writing and revise systematically.

Always Remember

Eligibility, vacancies, examination dates, syllabus, fee, rules and other conditions may change. Always treat the latest official UPSC notification as the final authority.

ISS Quick Revision

Topic	Quick Information
Full Form	Indian Statistical Service
Conducting Body	Union Public Service Commission (UPSC)
Examination	Indian Economic Service / Indian Statistical Service Examination
Service	Central Government Group 'A' Statistical Service
Main Subject	Statistics
Other Papers	General English and General Studies
Written Examination	1000 Marks
Viva Voce	200 Marks
Statistics Papers	Statistics-I, Statistics-II, Statistics-III and Statistics-IV
Preparation Priority	Statistics + PYQs + Numerical Practice + Revision
Official Authority	UPSC

ISS Preparation Checklist

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Latest UPSC syllabus पढ़ लिया है।

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Eligibility conditions check कर ली हैं।

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Statistics के standard books select कर ली हैं।

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General English की regular practice शुरू कर दी है।

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General Studies और Current Affairs पढ़ रहे हैं।

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Previous Year Papers solve कर रहे हैं।

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Numerical practice रोज कर रहे हैं।

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Descriptive answer writing की practice कर रहे हैं।

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Mock Tests और time management पर काम कर रहे हैं।

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Regular revision schedule follow कर रहे हैं।

Important Note for ISS Aspirants

ISS examination से संबंधित eligibility, age limit, vacancies, application dates, examination dates, syllabus, fee, examination rules और अन्य conditions समय के साथ बदल सकती हैं।

इसलिए किसी भी application या preparation decision से पहले latest UPSC notification और official instructions को जरूर check करें।

Final Source of Information

Official UPSC notification और UPSC द्वारा जारी instructions को final और authoritative source माना जाना चाहिए।

Best Wishes for ISS Preparation

सही syllabus, सही books, consistent practice, Previous Year Questions और नियमित revision के साथ अपनी preparation को systematic रखें।

मेहनत के साथ smart preparation और समय का सही management आपकी तैयारी को मजबूत बना सकता है।