The Combined Defence Services examination is conducted by UPSC twice every year and serves as a gateway for graduates to enter the Indian Armed Forces through academies such as the Indian Military Academy, Indian Naval Academy, Air Force Academy, and Officers' Training Academy. It is one of the most competitive defence examinations in India due to the prestige associated with defence services and the limited number of vacancies available. The selection process consists of three stages: written examination, Services Selection Board interview, and medical examination. Each stage evaluates different aspects of a candidate's capabilities including academic knowledge, personality, leadership skills, and physical fitness. The written examination includes English, General Knowledge, and Mathematics sections, except for OTA candidates who are not required to attempt Mathematics. The exam is objective in nature and requires candidates to balance speed and accuracy effectively. The SSB interview is a comprehensive evaluation process that includes psychological tests, group discussions, and personal interviews. Candidates who adopt a structured preparation approach focusing on concept clarity, practice, and analysis significantly improve their chances of success in this highly competitive examination.
UPSC CDS/OTA Courses

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Free UPSC CDS/OTA Course
Important Links & Resources
For accurate and official information related to the CDS examination, candidates should always refer to the official website of Union Public Service Commission. The official portal provides detailed notifications, application forms, exam updates, and important announcements. Regularly checking the official website ensures that you stay updated with the latest changes in exam dates, eligibility criteria, and guidelines, helping you avoid missing any critical updates during the preparation process.
https://upsc.gov.in/Explore UPSC CDS/OTA Preparation
Take your CDS preparation to the next level with structured resources designed to improve accuracy, speed, and overall performance. Explore dedicated courses, practice modules, and revision tools that help you cover the syllabus efficiently and perform better in the exam. Whether you want to strengthen fundamentals, attempt mock tests, or revise key concepts, these resources provide a complete preparation ecosystem tailored for CDS aspirants.
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Start your CDS 2026 preparation today with a structured, result-oriented approach designed to maximize your score and improve your chances of selection. Access high-quality study resources, previous year questions, full-length mock tests, and performance analytics in one place. Identify your strengths and weaknesses, improve accuracy, and build confidence through consistent practice and analysis. Whether you are preparing for your first attempt or aiming to improve your previous score, a disciplined and strategic approach is essential for success. Do not wait for the perfect moment; begin your preparation now and stay consistent throughout the journey. Every day of focused effort brings you closer to your goal of joining the Indian Armed Forces. Take the first step today and commit to a preparation strategy that delivers real results.
Explore Other Exams
If you are preparing for CDS, you may also be interested in other competitive exams conducted by UPSC and intelligence agencies. Exploring these exams can open additional career opportunities and help you diversify your preparation strategy. Many concepts overlap across exams, allowing you to prepare efficiently and increase your chances of success in multiple opportunities.