The Union Public Service Commission (UPSC) conducts the Combined Defence Services (CDS) Examination to select eligible graduates for officer training in the Indian Armed Forces. Candidates who want to join the Indian Military Academy (IMA), Indian Naval Academy (INA), Air Force Academy (AFA), or Officers' Training Academy (OTA) must understand the complete CDS selection process before beginning their preparation.

The CDS Selection Process 2027 involves a written examination, the Services Selection Board (SSB) interview, a medical examination, and final merit-based selection. Candidates must qualify at the required stages, satisfy the prescribed medical standards, and meet the conditions for their preferred academy. Final selection also depends on the number of available vacancies and the candidate's position in the merit list.

This guide explains each stage of the CDS 2027 selection process, including the written exam pattern, SSB tests, medical standards, final merit calculation, and preparation tips.

CDS Selection Process 2027: Overview

The following table provides an overview of the major stages of the CDS selection process.

Candidates should refer to the relevant official UPSC CDS examination notification for the applicable year's eligibility requirements, examination scheme, and instructions.

1. CDS Written Examination 2027

The written examination is the first stage of the CDS selection process. UPSC conducts this examination to assess candidates' knowledge, comprehension, and problem-solving abilities.

Candidates must qualify in the written examination to become eligible for the SSB interview. The examination pattern differs according to the academy selected by the candidate.

CDS Written Exam Pattern 2027

Each paper is conducted for two hours. The examination consists of objective-type questions, and negative marking applies to incorrect answers according to the prescribed scheme.

For IMA, INA, and AFA, candidates must attempt all three papers. Candidates applying for OTA take only English and General Knowledge; Elementary Mathematics is not part of the OTA written examination.

English Paper

The English paper assesses a candidate's understanding and correct use of the English language. Questions may cover grammar, vocabulary, sentence structure, comprehension, and the appropriate use of words.

Candidates should practise previous-year question papers, improve their vocabulary, revise grammar rules, and read English passages regularly. Timed practice can help improve both accuracy and speed.

General Knowledge Paper

The General Knowledge paper evaluates candidates' awareness of current affairs and their understanding of subjects such as history, geography, science, and other areas included in the syllabus.

Aspirants should revise basic concepts, follow important national and international developments, and practise questions from previous CDS examinations. Regular revision is particularly important because the paper covers multiple subjects.

Elementary Mathematics Paper

The Elementary Mathematics paper tests mathematical knowledge at approximately the level prescribed in the official CDS syllabus. Major areas include arithmetic, algebra, trigonometry, geometry, mensuration, and statistics.

Candidates should develop conceptual clarity before concentrating on speed. Solving previous-year papers, revising formulas, and analysing calculation errors can help improve performance.

Minimum Qualifying Marks in the Written Examination

UPSC determines the minimum qualifying marks for the written examination. Candidates must meet the applicable qualifying requirements to proceed to the next stage.

Simply passing the written examination does not guarantee an SSB recommendation or final admission. Candidates should aim for a competitive score while maintaining accuracy across their papers.

2. CDS SSB Interview 2027 Details 

Candidates who qualify in the written examination are called for the Services Selection Board (SSB) interview according to their eligibility, academy preferences, and the applicable selection procedure.

The SSB assesses a candidate's intelligence, personality, communication, decision-making, leadership potential, and suitability for a career as an officer in the Armed Forces.

The SSB procedure has two main stages. Candidates must qualify in Stage I to continue to Stage II.

Stage I: Screening Test

Stage I is conducted on the first day of reporting at the SSB. It includes the following assessments:

Officer Intelligence Rating (OIR) Test: This test evaluates reasoning and problem-solving ability through verbal and non-verbal intelligence questions.

Picture Perception and Description Test (PP&DT): Candidates observe a picture, prepare a story based on their perception, and participate in a group discussion as required by the procedure.

Candidates are screened based on the prescribed assessment process. Those who do not qualify in Stage I are generally returned after screening, while successful candidates proceed to Stage II.

Stage II: Psychological Tests, GTO Tasks and Interview

Candidates who clear Stage I undergo further assessments designed to evaluate their personality and suitability for officer training.

• Psychological Tests: These tests assess responses, thought processes, behaviour, and personality through exercises such as the Thematic Apperception Test (TAT), Word Association Test (WAT), Situation Reaction Test (SRT), and Self-Description Test.
• Group Testing Officer (GTO) Tasks: These activities evaluate teamwork, cooperation, communication, planning, initiative, and practical problem-solving. Group discussions, group planning exercises, progressive group tasks, individual obstacles, and command tasks may form part of the assessment.
• Personal Interview: The interviewing officer asks questions about the candidate's background, education, interests, family, achievements, awareness, and reasons for joining the Armed Forces. Candidates should answer honestly and demonstrate self-awareness rather than memorising prepared responses.
• Conference: At the final conference, the assessors discuss the candidate's overall performance and decide whether the candidate meets the required assessment standards.

The SSB assesses candidates holistically. Aspirants should therefore focus on developing genuine qualities, communication skills, teamwork, awareness, and sound decision-making instead of preparing isolated answers for individual tests.

3. CDS Medical Examination 2027

Candidates recommended by the SSB must undergo the prescribed medical examination. The purpose of this examination is to determine whether a candidate meets the medical and physical standards required for the relevant service and academy.

The medical assessment is conducted by the authorised medical board under the applicable Armed Forces medical guidelines.

What Is Checked During the CDS Medical Examination?

The medical examination may include assessments of:

• General physical health and overall fitness.
• Vision and eye health.
• Hearing and ear health.
• Dental health.
• Cardiovascular and respiratory health.
• Musculoskeletal health, including bones, joints, and posture.
• Other medical conditions relevant to the prescribed service standards.

The exact requirements depend on the applicable medical standards and the academy or service for which the candidate is being considered. Air Force candidates may be subject to additional service-specific and aviation-related medical requirements.

Candidates should review the official medical standards before applying and seek appropriate medical advice if they have concerns about their fitness. Meeting the written examination and SSB requirements does not automatically establish medical fitness.

What Happens If a Candidate Is Declared Medically Unfit?

A candidate declared medically unfit may be allowed to appeal or undergo a review medical examination, where permitted under the applicable rules. The procedure, eligibility, and deadlines depend on the medical board's decision and the relevant service instructions.

Candidates should follow the instructions provided by the authorities and submit any required representations within the prescribed period. A medical appeal does not guarantee a change in the original decision.

4. CDS Final Merit List 2027

The final merit list is prepared after the relevant selection stages. Candidates must meet the required qualifying standards in both the written examination and the SSB assessment, satisfy medical fitness requirements, and fulfil the applicable eligibility conditions.

For IMA, INA, and AFA, the written examination carries 300 marks and the SSB interview carries 300 marks, giving a combined total of 600 marks.

For OTA, the written examination carries 200 marks and the SSB interview carries 200 marks, giving a combined total of 400 marks.

How Are CDS Final Marks Calculated?

For example, an IMA candidate who scores 175 marks in the written examination and 220 marks in the SSB assessment would have a combined score of 395 out of 600.

Similarly, an OTA candidate who scores 125 marks in the written examination and 150 marks in the SSB assessment would have a combined score of 275 out of 400.

These examples are illustrative only. Actual admission depends on the applicable merit position, qualifying requirements, medical fitness, academy preferences, eligibility, and available vacancies.

Is Medical Fitness Included in the Merit Score?

Medical fitness is an essential condition for final selection, but medical examination marks are not added to the written examination and SSB marks. Candidates must meet the applicable medical standards to be considered for admission.

A high combined score does not override a failure to meet the prescribed medical or eligibility requirements.

Does Clearing the CDS Written Exam Guarantee Final Selection?

No. Qualifying in the written examination only makes a candidate eligible to proceed to the SSB stage, subject to the applicable instructions.

Candidates must also qualify in the SSB assessment, meet medical standards, and secure a position within the relevant merit requirements. Final admission depends on the number of vacancies and other conditions specified in the official notification.

5. Academy-Wise Selection Through CDS 2027

The CDS examination provides entry into different officer training academies. The selection process follows the relevant eligibility conditions and service-specific requirements.

Indian Military Academy (IMA): Candidates selected for IMA undergo training to become officers in the Indian Army through the applicable entry scheme.

Indian Naval Academy (INA): Eligible candidates selected for INA undergo officer training for the Indian Navy. Candidates must meet the prescribed educational and other eligibility requirements.

Air Force Academy (AFA): Candidates selected for AFA undergo training for the relevant Air Force officer entry. They must satisfy the applicable educational, age, and medical requirements, including aviation-related standards where applicable.

Officers' Training Academy (OTA): Candidates selected for OTA undergo training for the Short Service Commission entry covered by the CDS examination. The written examination for OTA consists of English and General Knowledge.

Candidates should carefully review academy-specific eligibility conditions, gender requirements, marital status conditions, and service preferences before submitting the application.

6. Important Documents Required During CDS Selection

Candidates should keep their documents organised and follow the instructions provided by UPSC and the relevant service headquarters. Requirements may differ according to the stage and academy.

Commonly required documents include:

• Matriculation certificate or equivalent proof of date of birth.
• Degree certificate or provisional degree certificate.
• Marksheets for the required academic years or semesters.
• Valid photo identification, where required.
• UPSC application and examination-related documents.
• SSB call-up letter and reporting instructions.
• Any category, service, or other supporting certificates applicable to the candidate.

Candidates should carry original documents and the required photocopies as specified in the official instructions. They should also check whether any additional documents are required for their academy or entry.

Candidates who qualify for the written examination and have selected Army as their first preference should follow the applicable registration instructions on the Indian Army recruitment website to receive SSB call-up information. They should ensure that their registration details comply with the official requirements.

7. How to Prepare for the CDS Selection Process 2027

A balanced preparation plan should cover the written examination and the SSB interview. Candidates should avoid focusing exclusively on written marks while ignoring the skills and qualities assessed during the later stages.

Understand the complete syllabus: Review the official syllabus for English, General Knowledge, and Elementary Mathematics, as applicable to your academy. Divide the syllabus into manageable topics and set weekly targets.

Practise previous-year papers: Previous-year questions help candidates understand question patterns, recurring topics, difficulty levels, and time requirements.

Take regular mock tests: Attempt full-length tests under timed conditions. Analyse incorrect answers, unanswered questions, and topics that take too much time.

Revise current affairs and general knowledge: Follow reliable news sources and revise important developments regularly. Build a strong foundation in history, geography, science, and other syllabus areas.

Develop communication skills: Read regularly, practise expressing ideas clearly, and participate in discussions. Good communication can support performance during group activities and interviews.

Prepare for the SSB process: Understand the purpose of screening, psychological tests, GTO tasks, interviews, and the conference. Focus on self-awareness, teamwork, decision-making, and honest responses.

Maintain physical fitness: Follow a suitable exercise routine and maintain healthy habits. Physical preparation should be gradual and consistent, taking individual fitness levels into account.

Keep documents ready: Check eligibility requirements and document instructions early to avoid last-minute problems during SSB reporting and subsequent stages.

How Major Kalshi Classes Can Help with CDS Preparation

Major Kalshi Classes (MKC) provides defence examination preparation resources for aspirants working towards careers in the Indian Armed Forces. Candidates preparing for CDS can use structured study plans, subject-wise practice, mock tests, revision, and guidance for the SSB interview to organise their preparation.

Aspirants should choose a preparation programme that matches their current level, available study time, and target examination. Consistent practice and performance analysis are important throughout the process.

Candidates should also refer to the official UPSC notification and the relevant service recruitment websites for the latest selection instructions, eligibility conditions, and medical standards.