Each year, more than 5 lakh candidates appear for the Combined Defence Services (CDS) Examination conducted by the Union Public Service Commission (UPSC), with only 7,000 to 9,000 managing to clear it. The exam demands dedicated preparation, strategic time management, and a strong conceptual understanding to succeed. If you’re planning to take the CDS exam in 2025, here’s everything you need to know about the CDS exam pattern and syllabus.

The CDS Recruitment 2025 exam is a national-level test organized by UPSC to recruit commissioned officers for various positions across the Indian Military Academy (IMA), Indian Naval Academy (INA), Air Force Academy (AFA), and Officers’ Training Academy (OTA).

• Indian Military Academy
• Officer’s Training Academy
• Indian Naval Academy
• Indian Air Force Academy

To succeed, it’s essential to understand the updated UPSC CDS exam pattern. This article provides detailed information about the exam structure, syllabus, and marking scheme.

What is the CDS Exam?

The Combined Defence Services (CDS) Exam is a national-level examination conducted by the Union Public Service Commission (UPSC) to recruit candidates for prestigious training academies, including the Indian Military Academy (IMA), Indian Naval Academy (INA), Air Force Academy (AFA), and Officers’ Training Academy (OTA).

This exam evaluates candidates on their knowledge, aptitude, reasoning ability, and leadership qualities to determine their suitability for becoming commissioned officers in the Indian Armed Forces. It consists of a written examination, followed by a rigorous SSB (Services Selection Board) interview, which assesses a candidate’s intelligence, personality, and physical fitness.

The CDS Exam provides a golden opportunity for defence aspirants to serve the nation with pride and honor. Candidates who qualify for the SSB interview undergo intensive training at their respective academies before being commissioned into the Army, Navy, or Air Force. The exam requires dedicated preparation, covering subjects such as English, General Knowledge, and Mathematics, along with physical and psychological readiness to excel in the selection process.

CDS Exam Pattern: Highlights

Every year, UPSC conducts the CDS exam to recruit candidates for officer posts in INA, IMA, OTA, and AFA. By formulating the CDS Exam Pattern, UPSC ensures that selected candidates possess the required knowledge and skills needed for a career in the armed forces.

The exam comprises a written test followed by the SSB interview, assessing candidates’ aptitude, reasoning, and general awareness. The written exam includes subjects like English, General Knowledge, and Mathematics (for IMA, INA, AFA). A well-structured preparation strategy, regular practice with mock tests, and time management are crucial to clearing the CDS 2025 exam successfully. The SSB interview further evaluates leadership qualities, personality, and decision-making skills, making it essential for aspirants to focus on both written and personality assessment stages.

Here is an overview of the CDS exam 2025 in tabular format:

Exam Name	Combined Defense Service (CDS)
Conducted By	Union Public Service Commission
Frequency of the Exam	Twice a Year
Stages of Exam	Written Exam, SSB Interview, Medical Examination
Official Website	https://www.upsc.gov.in/

To improve your chances of qualification, go through the complete exam pattern of CDS Recruitment 2025.

CDS Exam Selection Process

There are three stages you will have to clear if you wish to qualify for Combined Defence Services. The selection process includes a written exam, SSB interview, and medical examination. Listed below are also the CDS exam 2025 changes and updates in exam pattern, eligibility criteria, and selection methodology:

1. CDS Written Exam 2025: Each exam will be of a two-hour duration with multiple-choice questions. Once you pass your exam, you will be called for the SSB Interview.
2. SSB Interview for CDS Recruitment: This stage involves a 5-day selection process, during which you will be tested for your intelligence, physical strength, personality, and so on. After you clear this interview, you will be called for a medical examination and document verification.
3. Medical Examination & Document Verification: The medical examination for CDS is conducted by a Special Medical Board for about four to six days. You have to produce all the required documents when you appear for this medical examination.

Keep checking the official website of UPSC for the latest updates on the CDS exam pattern of 2025.

CDS Written Test Exam Pattern

The CDS exam pattern consists of three papers:

• English paper 
• General Knowledge Exam
• Elementary Mathematics

CDS Exam Pattern for OTA

The CDS OTA Exam Pattern includes only English and General Knowledge papers.

• You get two hours to attempt each of these papers.
• Each paper will be for 100 marks.
• There will be negative markings for wrong answers.
• The mode of the exam is offline only. You will get an OMR sheet in which you will be colouring the right option.
• The medium of the exam could be Hindi or English

Here is the CDS OTA Exam Pattern, with various subjects and their weightage, in tabular format:

Subject	Duration	Maximum Marks
English	2 hours	100
General Knowledge	2 hours	100

*1/3rd of the total mark will be deducted for each wrong answer

CDS Exam Pattern for INA, IMA, AFA

CDS Paper	English	Mathematics	GK
Maximum Marks	100	100	100
Marks for Correct answer	+1 marks for each correct option	+1 marks for each correct option	+1 marks for each correct option
Marks deducted for an Incorrect answer	-0.33 marks for each wrong answer	-0.33 marks for each wrong answer	-0.33 marks for each wrong answer

CDS Exam Pattern for Officers’ Training Academy (OTA)

• The exam features multiple-choice questions (MCQs) designed to assess candidates’ knowledge and aptitude.
• The General Knowledge paper will be available in both English and Hindi to ensure accessibility for all candidates.
• The exam consists of two subjects: English and General Knowledge, each carrying 100 marks, making the total 200 marks.
• The duration for each subject is 2 hours, meaning the total exam duration is 4 hours.
• Candidates must focus on time management, accuracy, and subject knowledge to perform well in the CDS OTA exam 2025.

Subject-Wise Exam Structure

Subject	Duration	Maximum Marks
English	2 hours	100
General Knowledge	2 hours	100

CDS Exam Marking Scheme

The CDS Exam pattern includes negative marking, meaning candidates lose marks for incorrect answers. This makes it essential to understand the marking scheme to maximize scores and minimize deductions. Strategic answering and careful selection of responses can help improve overall performance and avoid unnecessary penalties.

Candidates receive one mark for each correct answer, while one-third of the marks allotted to a question are deducted for every incorrect response. Unattempted questions do not attract any penalty. To score well, candidates should focus on accuracy, time management, and practising previous years’ question papers to reduce mistakes and negative markings.

• Candidates should practice smart guessing techniques to avoid unnecessary negative markings and improve their final scores.
• Candidates receive 1 mark for each correct answer.
• One-third (1/3) of the marks allotted to a question will be deducted for each wrong answer.
• No marks are deducted for unanswered questions.

Here is a table showing the total marks and negative marking deductions for each paper of the CDS Exam:

CDS Paper	Maximum Marks	Marks for Each Correct Answer	Negative Marking
English	100	+1	0.33
General Knowledge	100	+1	0.33
Elementary Mathematics	100	+1	0.33

Instructions to Fill CDS Exam OMR Sheet

Candidates should follow the below instructions to fill the OMR sheet carefully, as these sheets are evaluated by a machine, and any errors may lead to disqualification or score reduction.

After receiving the CDS 2025 OMR Answer Sheet, candidates must verify if it is numbered at the bottom. If the sheet is not numbered, they should immediately request a replacement from the exam officials.

Candidates must use only a black ballpoint pen to fill in their details, roll numbers, and answers. Any overwriting, smudging, or incomplete filling of circles may result in answer rejection.

The following points should be kept in mind while filling CDS answer sheet:

• Carry with you a good quality black ball pen for marking your responses on the answer sheet
• The test Booklet Series will be indicated by Alphabets A, B, C, or D at the top right-hand corner of the Booklet.
• Find out the appropriate subject code from the test booklet. Thereafter, encode the test booklet series, subject code, and roll number by using a black pen.
• Candidates have to make sure that they have carefully encoded their subject Test Booklet series and Roll Number.
• Do not write your name or any information other than the specific items requested on the CDS answer sheet/test booklet/sheet for rough work.
• Avoid folding, or damaging the CDS OMR Answer Sheet.

CDS 2025 Updates

CDS 2025 Cut-Off

• The UPSC CDS I Cut-Off is released online a few days after the exam.
• The cut-off determines candidate selection for further rounds.
• Factors affecting the cut-off include exam difficulty, available vacancies, and overall candidate performance.

CDS 2025 Hall Ticket

• The CDS 2025 admit card is expected to be released in the last week before the exam.
• Candidates must log in to the UPSC portal using their registration ID/roll number and date of birth to download it.
• UPSC may also release exam city details along with the admit card.

CDS 2025 Answer Key

• The UPSC CDS I Answer Key helps candidates assess their performance.
• It ensures transparency in the evaluation process.
• Candidates can compare their answers and raise objections against the provisional answer key if needed.

CDS 2025 Result

• CDS 2025 results are expected to be announced by June 2025.
• The UPSC official website will host the results.
• The result includes roll numbers of recommended candidates, all India ranks, and qualifying marks.
• Separate merit lists are released for IMA, AFA, INA, SSC(M), and SSC(W).

CDS Exam Interview

Candidates who qualify for the CDS written exam will be invited to the SSB Interview, conducted in two stages to assess intelligence, leadership qualities, and personality traits.

Stage 1: Includes Officer Intelligence Rating (OIR), Picture Perception, and Description Test (PPDT), where candidates are evaluated on analytical thinking and observational skills.

Stage 2: Comprises the Interview, Group Testing Officer (GTO) Tasks, Psychology Test, and Conference, which test teamwork, leadership, and decision-making abilities.

The CDS SSB Interview spans four to five days, assessing candidates on physical fitness, mental agility, and psychological suitability for a career in the armed forces.

Important Points about the CDS Exam

• Use only a black ballpoint pen to write your exam center, subject name, CDS 2025 test booklet series (in brackets), subject code, and roll number in the designated space on the answer sheet.
• Fill in the CDS 2025 booklet series (A, B, C, or D), subject code, and roll number by shading the corresponding circles on the answer sheet.
• If the booklet series is missing or the answer sheet is unnumbered, report it immediately to the invigilator for a replacement.
• Any errors, omissions, or discrepancies in encoding details—especially the roll number and test booklet series code—can lead to answer sheet rejection.
• At the start of the exam, check the test booklet for missing, unprinted, torn, or incomplete pages. If any issue is found, request a replacement of the same series and subject.
• Do not write your name or any additional information on the answer sheet, test booklet, or rough worksheet.
• Avoid folding, damaging, or making unnecessary markings on the CDS answer sheet. Do not write on the back of the answer sheet.
• Candidates must strictly follow the invigilator’s instructions and avoid any unfair means during the examination.
• Ensure that the answer sheet is signed by both the candidate and the invigilator in the designated space before submitting it.

Conclusion

Clearing the CDS exam is the first step toward joining the Combined Defence Services of India. Before appearing for the exam, it’s essential to have a clear understanding of the syllabus and pattern. Familiarize yourself with all the key details, including the exam structure and marking scheme. A thorough grasp of the CDS exam pattern will help you strategically plan your preparation and approach the exam with confidence. Be sure to review all the points provided above to ensure you’re well-prepared for the challenges ahead.

Along with understanding the exam format, candidates should focus on time management, regular practice, and staying updated with current affairs. Solving previous years’ question papers and taking mock tests can enhance speed and accuracy. Physical fitness and mental resilience are equally important for clearing the SSB interview and medical examination successfully.

Recommended Reads:

• CDS
• CDS Salary
• CDS Book

Frequently Asked Questions ( FAQs )