Combined Defence Services (CDS) Exam is one of the most prestigious examinations conducted by the Union Public Service Commission (UPSC) for the recruitment of officers into the Indian Army, Navy, and Air Force.
The CDS 1 2025 exam will be an essential gateway for candidates who aspire to serve in the Indian Armed Forces. It is crucial for candidates to understand the exam syllabus, age criteria, and selection process to prepare effectively for this competitive exam.
In this article, we provide an in-depth guide to the CDS 1 2025 Exam Syllabus, age limit, and selection process. Read on to understand how to ace the exam and the steps to join the Indian Armed Forces through the CDS exam.
CDS 1 2025 Exam Syllabus
The syllabus for the CDS 1 2025 exam varies based on the candidate’s choice of entry into the Indian Armed Forces, i.e., Army, Navy, or Air Force. The written exam is divided into three papers, each focused on a different subject, depending on the entry you are applying for. Here’s the breakdown of the syllabus for each category:
1. Indian Military Academy (IMA), Indian Naval Academy (INA), and Air Force Academy (AFA)
General English (100 Marks):
- Vocabulary
- Grammar and Sentence Structure
- Comprehension
- Writing skills (Precis writing, Letter writing, etc.)
- Antonyms and Synonyms
General Knowledge (100 Marks):
- Current Events (National & International importance)
- History (Indian and World)
- Geography (Indian & World)
- Economy (India’s economic development)
- Polity (Indian Constitution, Parliament, Judiciary)
- Science & Technology (Basic concepts in Physics, Chemistry, and Biology)
- Indian Armed Forces and Defence-related topics
Elementary Mathematics (100 Marks):
- Arithmetic (Numbers, LCM, HCF)
- Algebra (Equations, Quadratic equations)
- Geometry (Lines, Angles, Triangles)
- Mensuration (Area, Volume, Surface area)
- Trigonometry (Heights and Distances)
- Statistics (Mean, Median, Mode, Probability)
2. Indian Military Academy (IMA) and Officer Training Academy (OTA)
For candidates applying for the Officer Training Academy (OTA), the syllabus for the General Knowledge and English papers remains the same, but the Mathematics paper is not included. Here is a brief summary of the OTA syllabus:
- General English (100 Marks)
- General Knowledge (100 Marks)
Detailed Syllabus Overview in Table Format
| Subject | IMA, INA, AFA (100 Marks each) | OTA (100 Marks each) |
|---|---|---|
| General English | Vocabulary, Grammar, Sentence structure, Comprehension | Vocabulary, Grammar, Sentence structure, Comprehension |
| General Knowledge | Current Affairs, History, Geography, Economy, Polity, Science | Current Affairs, History, Geography, Economy, Polity, Science |
| Elementary Mathematics | Arithmetic, Algebra, Geometry, Mensuration, Trigonometry, Statistics | N/A |
CDS 1 2025 Age Limit
The age limit for the CDS 1 2025 exam varies depending on the branch for which the candidate is applying. It is important to note that candidates must meet the age requirements to be eligible to sit for the exam.
- Indian Military Academy (IMA): Candidates must be between 19 and 24 years of age as of 1st July 2025.
- Indian Naval Academy (INA): Candidates must be between 19 and 22 years of age as of 1st July 2025.
- Air Force Academy (AFA): Candidates must be between 19 and 23 years of age as of 1st July 2025.
- Officer Training Academy (OTA): Candidates must be between 19 and 25 years of age as of 1st July 2025.
Important Note: Age relaxation may apply for candidates from certain categories, including SC/ST, OBC, and others as per government norms.
CDS 1 2025 Selection Process
The selection process for the CDS 1 2025 exam is divided into two main stages: the written examination and the SSB (Services Selection Board) Interview.
1. Written Examination:
The first stage involves the written examination, which consists of multiple-choice questions. The subjects include:
- General English
- General Knowledge
- Elementary Mathematics (for IMA, INA, AFA candidates)
The examination is conducted in offline mode and is typically held at various centers across the country. The total duration of the exam is 6 hours, and the questions are set in both English and Hindi (except for the English paper).
2. SSB Interview:
After successfully clearing the written exam, candidates who meet the cut-off will be called for the SSB Interview. The SSB interview is a multi-stage process that includes:
- Stage 1: Officer Intelligence Rating (OIR) Test and Picture Perception and Discussion Test (PPDT).
- Stage 2: Psychological Tests, Group Testing Officer (GTO) Tasks, and Personal Interview (PI).
The SSB Interview evaluates candidates on their leadership qualities, decision-making ability, teamwork, personality, and overall suitability to serve as an officer in the Indian Armed Forces.
3. Medical Examination:
Once the SSB interview is successfully cleared, candidates undergo a medical examination to ensure they meet the physical and medical standards required for joining the Armed Forces.
4. Final Merit List:
Based on the overall performance in the written exam, SSB interview, and medical examination, a final merit list is prepared. Candidates who are shortlisted in the merit list are selected for training at the respective academies (IMA, INA, AFA, OTA).
CDS 1 2025 Exam Important Dates
- Notification Release: 12th December 2024
- Application Start Date: 12th December 2024
- Application Last Date: 1st January 2025
- Admit Card Release: February 2025
- Exam Date: 2nd February 2025
- Result Declaration: March 2025 (tentative)


