Defence
NDA Entrance Exam
A complete guide to NDA Entrance Exam: eligibility, exam pattern, syllabus, preparation strategy, and frequently asked questions.
About This Exam
The NDA (National Defence Academy) entrance exam is the primary route for young aspirants who want to join the Indian Armed Forces as commissioned officers in the Army, Navy, or Air Force. Conducted by UPSC twice a year, it attracts around 5 to 6 lakh candidates each session for roughly 400 cadet positions, making the selection ratio extremely competitive. The NDA exam is unique because it is open to candidates immediately after Class 12, meaning successful candidates begin officer training at age 17 or 18. Cadets undergo three years of integrated military and academic training at the NDA campus in Khadakwasla, Pune, followed by service-specific training (Indian Military Academy for Army, Indian Naval Academy for Navy, or Air Force Academy for Air Force) before being commissioned as officers. The career path offers prestige, structured advancement, generous pay and perks, lifelong pension, comprehensive medical care, and opportunities to lead at very young ages. The job involves real demands on personal life including frequent transfers, postings to border areas, and the inherent risks of military service, but for candidates drawn to the work, the satisfaction is unmatched.
Conducting Body
Union Public Service Commission (UPSC)
Eligibility
10+2 or appearing; age 16.5-19.5 years; unmarried males (and females for certain entries); physically fit as per standards
Exam Pattern
The NDA (National Defence Academy) entrance exam is conducted by UPSC twice a year and is the primary route for young aspirants to join the Indian Army, Navy, and Air Force as officers. Around 5 to 6 lakh candidates appear each time for roughly 400 seats, making the selection ratio extremely competitive. The written exam has two papers: Mathematics (120 questions, 300 marks, 2.5 hours) and General Ability Test (150 questions, 600 marks, 2.5 hours covering English and General Knowledge). Qualified candidates then face a rigorous 5-day SSB Interview that includes psychological tests, group planning exercises, group discussions, outdoor tasks, and a personal interview. The SSB process is known for filtering out candidates who may have cleared the written exam but lack leadership qualities and team spirit. Preparation should start in Class 11, and NCERT Maths, Lucent's GK, and Pathfinder by Arihant are commonly used books. Clearing NDA leads to three years of training at the NDA campus in Khadakwasla, Pune, followed by specialised training in your service branch. It is one of the most respected career entries for young Indians who want to serve the country.
Syllabus
Mathematics (Algebra, Matrices, Trigonometry, Calculus, Statistics, Probability), English (Grammar, Vocabulary, Comprehension), General Knowledge (Physics, Chemistry, Biology, History, Geography, Current Events)
Preparation Tips
- Begin NDA preparation in Class 11; Mathematics requires sustained practice over 18 to 24 months
- Use NCERT Class 11 and 12 Mathematics as your primary text, supplemented by RD Sharma for advanced problems
- Build General Knowledge through Lucent's GK and daily newspaper reading focused on defence and current affairs
- Maintain physical fitness throughout preparation; the SSB and medical stages eliminate physically unprepared candidates
- Practice English grammar and comprehension daily through dedicated workbooks like Pathfinder by Arihant
- Watch SSB preparation videos from former officers to understand the personality test process and group exercises
Frequently Asked Questions
What is the age limit for NDA?
Candidates must be between 16.5 and 19.5 years of age on the first day of the month during which the NDA course commences. This makes NDA unique among major Indian exams because it is taken directly after Class 12 or during Class 12, with most candidates being 17 or 18 at the time of selection.
Is NDA open to female candidates?
Yes, since 2021, female candidates can appear for NDA and enter the National Defence Academy. This was a landmark reform that opened armed forces officer training to women through the NDA pathway. Female cadets undergo the same rigorous training and are commissioned as officers in the Army, Navy, or Air Force.
What happens after clearing NDA?
Selected cadets undergo 3 years of training at the National Defence Academy in Khadakwasla, Pune, where they complete academic coursework (equivalent to a degree) alongside military training. After NDA, cadets move to service-specific academies: IMA for Army, INA for Navy, or AFA for Air Force, for another year of specialised training before being commissioned.
Can I join defence without NDA?
Yes. Graduates can appear for the CDS (Combined Defence Services) exam or AFCAT for Air Force officer entry. University Entry Scheme (UES), Technical Graduate Course (TGC), and Short Service Commission (SSC) also provide alternative paths into the armed forces for graduates. Lateral entry options exist for specialised cadres as well.
What are the physical requirements for NDA?
Height requirements are typically 157 cm minimum for Army and Air Force (with relaxations for certain regions), 157 cm for Navy. Vision standards are strict, especially for flying branch (6/6 uncorrected). Physical fitness tests include running, sit-ups, push-ups, and chin-ups during the SSB (Services Selection Board) process. Medical examination after SSB is comprehensive and can disqualify candidates for specific conditions.
Last updated: April 2026