Combined Defence Services examination is a national level exam conducted by the government-regulated body, Union Public Commission (UPSC). It is mainly conducted in order to recruit eligible candidates for services like Indian Military Academy, Officers training Academy, Indian Naval Academy and Indian Air Force Academy. The selection process involves a written test followed by an interview. UPSC has recently released notification for CDS Exam 2025 on December 11, 2024. The CDS 2025 Exam application form has also opened and can be filled from the official website of UPSC. A total of 457 vacancies have been released. The CDS 1 2025 Exam application form will remain open till the 31st December, 2024.
All information regarding CDS I exam dates, exam pattern and scheme, syllabus, effective exam preparation strategies and much more are provided below:
Important Information
Event |
Dates (Tentative) |
Notification Release Date |
December 2024 |
Application Start Date |
December 2024 |
Application Last Date |
January 2025 |
Admit Card Availability |
February 2025 |
CDS 1 2025 Exam Date |
March 2025 |
Mode of Exam |
Offline (Pen and Paper) |
Duration |
2 hours per paper |
Result Declaration |
May 2025 |
Exam Pattern:
o IMA, INA, AFA: 3 papers (English, General Knowledge, Mathematics)
o OTA: 2 papers (English, General Knowledge)
o Each paper: 100 marks.
Applying for CDS I Exam 2025:
1. Visit the Official UPSC Portal:
o Go to the official UPSC website at https://upsconline.nic.in.
o Look for the link for CDS Exam 2025 under "Active Examinations."
2. Complete One-Time Registration (OTR):
o New users: Create an account by registering with personal details (name, email, contact number).
o Upload Required Documents: Provide your recent photograph, signature, and identity proof as per the guidelines.
3. Fill the CDS Application Form:
o Log in with your OTR credentials.
o Select CDS 2025 and fill out the form with personal, academic, and exam preferences.
o Choose your preferred exam center from the list available.
4. Upload Scanned Documents:
o Upload scanned copies of your passport-size photo, signature, and identity proof in the required format (JPEG/PDF).
5. Pay the Application Fee:
o General/OBC candidates: ₹200.
o SC/ST and Female candidates: Exempt from fees.
o Pay via credit/debit card, net banking, or SBI challan.
6. Submit the Application:
o Review all the information filled in the form.
o After verification, click on Submit to finalize the application.
o A unique Application Number will be generated—save it for future reference.
7. Download the Confirmation Page:
o After submission, download the confirmation page for your records. You may need it for admit card download and future queries.
APPLICATION FEES
The following table shows the application fees for various social categories:
Category |
Application Fee |
General/OBC Candidates |
₹200 |
SC/ST Candidates |
Exempted |
Female Candidates |
Exempted |
o Online payment can be made through Credit Card/Debit Card or Net banking.
o Offline payment can be made through SBI Challan.
Eligibility Criteria and other conditions:
Recruitment Criteria for CDS Exam 2025
The Combined Defence Services (CDS) exam serves as the gateway for recruitment into the Indian Armed Forces. Candidates must meet specific criteria related to age, nationality, and selection stages to qualify. Below is a detailed explanation of each criterion:
a) Age Limit - The age criteria vary depending on the academy the candidate is applying for:
1. Indian Military Academy (IMA):
o Age: 19–24 years
o Candidates must not be born earlier than 2nd January 2001 and not later than 1st January 2006.
Gender: Male candidates only.
2. Indian Naval Academy (INA):
o Age: 19–24 years
o Same birth date range as IMA.
o Gender: Male candidates only.
3. Air Force Academy (AFA):
o Age: 20–24 years.
o Candidates holding a valid and current Commercial Pilot Licence issued by DGCA (India) can have a relaxation of up to 26 years.
o Gender: Male candidates only.
4. Officers Training Academy (OTA):
o Men: Age 19–25 years.
o Women: Age 19–25 years.
o Both unmarried men and women are eligible for OTA.
b) Nationality
Eligibility extends to the following individuals:
1. Indian Citizens: Native Indians are eligible.
2. Nepal/Bhutan Nationals: Individuals from these countries are eligible provided they have a certificate of eligibility from the Government of India.
3. Tibetan Refugees:
o Those who came to India before January 1, 1962, with the intention of permanent settlement are eligible.
4. Migrants: Individuals of Indian origin from Pakistan, Sri Lanka, Burma, and East African countries like Kenya, Uganda, and Tanzania are eligible, provided they hold an eligibility certificate issued by the Indian government.
c) Educational Qualifications:
i) INDIAN MILITARY ACADEMY (IMA)
- Candidates should be engineering graduates from a recognized university/institute.
- They should have passed their examination or should be in the final year of their graduate programme, provided they complete the course before joining the Academy.
ii) Indian Naval Academy (INA)
- Candidates must possess Engineering degrees from a recognized university
- Candidate should have completed their B. Tech/B. E or should be in the final year of their engineering degree
- Only male candidates are eligible for this post
iii) Air Force Academy (AFA)
o Graduates (or equivalent) with a B. Tech/B.E. degree from a recognized university.
o Alternatively, candidates holding a Commercial Pilot License (CPL) issued by the Directorate General of Civil Aviation (DGCA) are also eligible.
o Gender: Male candidates only, though women can apply for certain roles in the Air Force via other channels.
o Note: CPL holders are also eligible with an age relaxation of up to 26 years.
iv) Officers Training Academy (OTA)
o Graduates (or equivalent) from any recognized university.
o Candidates should have passed their degree examination or be in their final year (as long as they complete their degree before joining the academy).
o Gender: Both male and female candidates are eligible.
d) Stages of Selection
The CDS selection process is divided into three key stages:
1. Written Examination:
o The first stage consists of a written test with objective-type questions.
o Candidates are tested on English, General Knowledge, and Mathematics (Mathematics is excluded for OTA).
o Negative marking is applicable for incorrect answers.
2. SSB Interview:
o Conducted in two stages over 5 days.
Stage I: Includes the Officer Intelligence Rating (OIR) Test and Picture Perception & Description Test (PPDT). Only candidates clearing this stage proceed to Stage II.
Stage II: Comprehensive evaluation of personality, leadership, and communication skills through:
- Personal Interview
- Group Testing Officer (GTO) Tasks
- Psychological Tests
- Conference
3. Medical Examination and Document Verification:
o Candidates who clear the SSB interview are subjected to rigorous medical tests to assess physical and mental fitness.
o Document verification involves validating educational qualifications, age, and identity proofs as per UPSC guidelines.
Key Notes
o Failing to meet any of these criteria may lead to disqualification at any stage.
o Candidates must remain unmarried during the selection and training process for IMA, INA, and AFA. However, OTA allows married candidates above 25 years.
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CDS I 2025 Exam Stages:
The selection process for the CDS 2025 exam involves three main stages: the Written Exam, SSB Interview, and Medical Examination. Here's a detailed explanation of each:
1. Written Exam
The Written Exam is the first stage of the selection process. It evaluates the candidate’s knowledge and reasoning abilities.
o Objective-Type Questions: The exam consists of multiple-choice questions (MCQs) from three subjects:
- English: Focuses on grammar, vocabulary, and comprehension.
- General Knowledge: Includes topics like current affairs, history, geography, politics, and general science.
- Mathematics: Relevant to IMA, INA, and AFA candidates (OTA candidates are exempt from this).
o Duration:
- English and General Knowledge: 2 hours each.
- Mathematics: 2 hours (for IMA, INA, and AFA candidates).
o Negative Marking: 1/3 of the marks allocated for a question will be deducted for each incorrect answer. This makes it important to be cautious while answering.
2. SSB Interview
After passing the written exam, candidates are invited for the SSB Interview (Service Selection Board), which evaluates their suitability for a career in the armed forces.
o Leadership, Personality, and Communication: The SSB Interview is designed to test various aspects of a candidate’s personality, such as leadership, decision-making, teamwork, and communication skills.
o Stages of SSB Interview:
Stage 1:
- Officer Intelligence Rating (OIR) Test: A psychological test assessing cognitive abilities.
- Picture Perception and Description Test (PPDT): Candidates are shown an image and asked to describe it, testing their observation and analytical skills.
Stage 2:
- Personal Interview: One-on-one conversation to evaluate the candidate’s personality and leadership potential.
- Group Testing Officer (GTO) Tasks: Group discussions, outdoor tasks, and problem-solving exercises to assess the candidate’s interaction in team settings.
- Psychological Tests: Written tests that measure mental attributes like stress tolerance and problem-solving.
- Conference: A final round where assessors discuss the performance of the candidate.
3. Medical Examination
i) Physical Standards for Height and Weight
The height and weight standards vary slightly across the different services. Here is a breakdown:
o Indian Military Academy (IMA) and Officers Training Academy (OTA):
o Height:
- Male candidates: Minimum 157.5 cm (5 feet 2 inches).
- Female candidates: Minimum 152.5 cm (5 feet).
o Weight: The weight should be proportionate to height as per the medical standards. An acceptable weight range varies with age and height.
o Indian Naval Academy (INA):
o Height:
- Male candidates: Minimum 157 cm (5 feet 2 inches).
o Weight: Candidates must meet the required weight standards for their height, with proportionality as per the medical norms.
o Air Force Academy (AFA):
o Height:
- Male candidates: Minimum 162.5 cm (5 feet 4 inches).
- Female candidates: Minimum 162.5 cm (5 feet 4 inches).
o Weight: Should be proportionate to height.
ii). Vision Standards
CDS Vision Standards are strict to ensure that candidates are capable of fulfilling military duties. Here’s a breakdown:
o IMA and OTA Visual Standards:
o Distant Vision:
- 6/6 in one eye and 6/9 in the other eye.
o Near Vision:
- J1 for both eyes (reading vision).
o Color Vision: Must be normal.
o Naval Academy (INA) Visual Standards:
o Distant Vision:
- 6/6 in one eye and 6/9 in the other eye.
o Near Vision:
- J1 for both eyes.
o Color Vision: Must be normal (must pass the Ishihara test).
o Air Force Academy (AFA) Visual Standards:
o Distant Vision:
- 6/6 in one eye and 6/12 in the other eye.
o Near Vision:
- J1 for both eyes.
o Color Vision: Must be normal, with candidates needing to pass the Ishihara Test.
o Myopia (Nearsightedness): Not more than -3.5D (diopters).
o Hypermetropia (Farsightedness): Not more than +3.5D.
3. Maddox Rod Test
The Maddox Rod Test is used to evaluate binocular vision (the ability of both eyes to work together) and stereoscopic vision (depth perception). The standards include:
o Both eyes should work together properly to ensure effective depth perception.
o Candidates must pass this test, meaning no significant abnormalities or misalignment in their vision.
4. Mental Health and Overall Fitness Evaluation
o Mental Health: Candidates must not have any psychiatric disorders, neurotic tendencies, or addictions.
o General Fitness:
- Candidates must pass physical fitness tests, which include endurance and strength evaluations. This ensures that they are physically prepared for the rigors of military life.
Exam Pattern and Scheme
Academy |
Subjects |
Marks |
Duration |
IMA, INA, AFA |
English, GK, Maths |
300 |
6 hours |
OTA |
English, GK |
200 |
4 hours |
- English: Objective questions on grammar, vocabulary, and comprehension.
- GK: Topics from current events, geography, history, polity, and science.
- Maths: Topics from elementary mathematics (up to class 10).
CDS I 2025 Exam Syllabus:
Subjects |
Topics |
English |
Antonyms, Sentence improvement, Comprehension, Synonyms, Spotting Errors, etc. |
General Knowledge |
Economics, Current Awareness, Defence, Biology, Physics, Chemistry, etc. |
Elementary Maths |
Arithmetic, Algebra, Trigonometry, Geometry, Mensuration, Statistics, etc. |
CDS I 2025 Exam Vacancy:
Service |
Vacancies |
Indian Military Academy (IMA) |
215 |
Indian Naval Academy (INA) |
40 |
Air Force Academy (AFA) |
32 (includes 3 for NCC Special Entry) |
Officers’ Training Academy (OTA) (Men) |
109 |
Officers’ Training Academy (OTA) (Women) |
61 |
Total |
457 |
CDS I 2025 Exam Centers:
The following table provides a list of exam centers across India where the CDS I exam 2025 will be conducted:
Exam Centers |
Exam Centers |
Agartala |
Indore |
Agra |
Itanagar |
Ajmer |
Jammu |
Ahmedabad |
Kochi |
Aizawl |
Kohima |
Aligarh |
Kozhikode |
Almora |
Madurai |
Bengaluru |
Mumbai |
Bhopal |
Mysore |
Chandigarh |
Nagpur |
Faridabad |
Navi Mumbai |
Ghaziabad |
Panaji |
Gaya |
Patna |
Gangtok |
Prayagraj (Allahabad) |
Gorakhpur |
Port Blair |
Gwalior |
Puducherry |
Gautam Buddh Nagar |
Siliguri |
Hyderabad |
Thane |
Vijayawada |
Visakhapatnam |
Warangal |
Srinagar |
Effective Preparation Strategies
Following strategies streamline a student’s preparation for the upcoming CDS I Exam 2025:
1. Understand the Exam Pattern and Syllabus
- Familiarize yourself with the exam structure and syllabus for each paper (English, General Knowledge, and Mathematics for IMA, INA, AFA; and English and General Knowledge for OTA).
- Focus on high-weightage topics like Arithmetic, Geometry, Current Affairs, and Grammar.
2. Create a Comprehensive Study Plan
- Allocate specific time slots for each subject daily, ensuring balanced coverage of all topics.
- Dedicate more time to subjects or sections where you feel less confident.
3. Practice with Previous Year Papers
- Solve past years’ question papers to understand the question types, difficulty levels, and time management.
- This helps in identifying recurring topics and patterns in the exam.
4. Take Mock Tests
- Regular mock tests improve speed, accuracy, and confidence.
- Analyze test results to identify weak areas and work on them.
5. Focus on Current Affairs
- Stay updated with national and international news, focusing on the last 6–8 months before the exam.
- Read newspapers, follow government reports, and use apps or online platforms for daily current affairs.
6. Improve Time Management
- Develop strategies to attempt maximum questions within the time limit.
- Prioritize easier questions to ensure you secure marks before tackling challenging ones.
7. Work on Physical and Mental Fitness
- Regular exercise and a healthy lifestyle prepare candidates for the physical tests after the written exam.
- Engage in relaxation techniques like yoga or meditation to reduce stress.
8. Avoid Guesswork
- Since there is negative marking, avoid random guesses. Attempt only those questions where you are confident.
9. Revise Thoroughly
- Regularly revise important concepts, formulas, and key points.
- Create short notes or flashcards for quick revisions.
10. Preparation for the SSB Interview
- Start personality development early, focusing on leadership and communication skills.
- Practice psychological tests, group discussions, and personal interviews to prepare for Stage II of the SSB.
11. Physical Standards Preparation
- Meet the required physical standards by maintaining fitness.
- Familiarize yourself with the basic exercises and endurance tests required for the SSB.
Best Study Materials
Disha Publications offers a range of best study materials for CDS I Exam 2025, equipped with previous year questions, mock test series and detailed topic wise explanation of the papers. These are prepared by subject experts and will help you sail through the exam with flying colours.
Read More: UPSC NDA 2025: NDA 1 Notification, Exam Dates, Vacancies & Application Details
FAQs
1. What is the application fee for the CDS I 2025 exam?
The application fee is ₹200 for General and OBC male candidates. SC/ST candidates, as well as female applicants, are exempt from paying the fee. Payments can be made online or via cash at an SBI branch.
2. What are the minimum and maximum age limits for applying?
The age criteria vary based on the academy:
- IMA and INA: 19–24 years
- AFA: 20–24 years
- OTA (Men and Women): 19–25 years
3. What are the visual standards for different academies?
- IMA and OTA: Minimum distant vision 6/6 in one eye and 6/9 in the other, correctable to 6/6 with glasses.
- INA: 6/6 in one eye and 6/9 in the other, with limits on myopia and hypermetropia.
- AFA: Near vision N-5 and distant vision 6/6 in each eye without correction.
4. When will the CDS I 2025 exam be conducted?
The CDS I 2025 written exam is scheduled for April 13, 2025. Admit cards will be available three weeks before the exam.
5. What is the marking scheme for the written examination?
Each correct answer awards 1 mark, while incorrect answers incur a penalty of 1/3rd mark. Questions left unanswered do not attract any penalty.