How to Crack NDA Exam 2026

What is NDA and Who Can Apply?

NDA (National Defence Academy) is the premier joint defence training institute of India, located in Pune. The NDA exam is conducted by UPSC twice a year (NDA I in April, NDA II in September) for admission to the Army, Navy, and Air Force wings of NDA.

Eligibility: - Class 12 (or appearing in Class 12) for Army wing: PCM not required, any stream eligible - Class 12 with PCM for Navy and Air Force wings - Age: 16.5 to 19.5 years at time of commencement of course - Male and female candidates both eligible (females eligible for all three wings after the Supreme Court order) - Unmarried status required - Physical standards: Height minimum 157 cm (Army/Navy), 162.5 cm (Air Force); vision and medical standards apply

After NDA training (3 years): Graduate with BSc/BA degree from Jawaharlal Nehru University (JNU) + Pre-commissioning training at respective service academies (IMA for Army, INA for Navy, AFA for Air Force) → Commissioned as Lieutenant/Sub-Lieutenant

This is one of the most prestigious career paths in India — commissioned officers in Indian defence forces are highly respected.

NDA Exam Pattern and Syllabus

NDA exam (written) has two papers:

Paper 1 — Mathematics (300 marks, 2.5 hours): Class 11 and 12 Maths: - Algebra: Concept of set, complex numbers, matrices, determinants, quadratic equations, sequence and series, permutations and combinations, logarithms - Calculus: Concept of limit, differentiation, integration - Statistics and Probability: Mean, variance, probability - Trigonometry: Functions, inverse trig, properties of triangles - Coordinate Geometry: Lines, circles, conics - 3D Geometry and Vector Algebra - Differential Calculus, Integral Calculus - Total: 120 questions × 2.5 marks each = 300 marks - Negative marking: -0.83 for each wrong answer

Paper 2 — General Ability Test (GAT) (600 marks, 2.5 hours): Part A — English (200 marks): - Grammar (tenses, voice, narration, one-word substitution, synonyms, antonyms) - Reading comprehension - Sentence structure and vocabulary

Part B — General Knowledge (400 marks): - Physics (100 marks) — Class 11-12 Physics basics - Chemistry (60 marks) — Class 11-12 Chemistry basics - Biology (40 marks) — General biology concepts - History (80 marks) — Indian history, freedom struggle - Geography (80 marks) — Physical, human, and economic geography - Current Affairs (40 marks) — Important national/international news

Total written: 900 marks

NDA Mathematics Preparation Strategy

Mathematics Paper 1 is often the differentiating factor in NDA:

Most important topics (highest questions): 1. Algebra: Complex numbers, matrices and determinants, quadratic equations, sequences and series — 25–35 questions 2. Trigonometry: All trig ratios, identities, inverse functions, triangle properties — 15–20 questions 3. Calculus: Limits, differentiation, integration basics — 15–20 questions 4. Coordinate Geometry: Lines, circles, parabola, ellipse — 15–20 questions 5. Statistics and Probability — 10–15 questions

Strategy: - NDA Maths is Class 11-12 level but covers everything. Revise NCERT Class 11-12 Maths thoroughly. - R.S. Aggarwal Mathematics for NDA/NA is the standard reference - Previous year NDA Maths papers are the best practice material - Aim for 200+ out of 300 in Maths for a competitive score

Common mistakes: - NDA Maths has tricky negative marking (-0.83 per wrong answer). Avoid guessing in Maths — only mark if you're confident. - Students often neglect Statistics and Probability — these are easier marks - Complex numbers and matrices tend to be highest-weightage — master these first

NDA General Ability Test (GAT) Preparation

GAT is 600 marks (66% of written paper) — many students focus only on Maths and underperform in GAT:

English (200 marks): - Grammar: Spot the errors, fill blanks, one-word substitution, sentence correction - Vocabulary: Synonyms, antonyms, idioms - Comprehension: Reading passages

Strategy: Practice from general English aptitude books. Read English newspapers. Grammar rules (tenses, voice, speech) must be clear.

Physics (100 marks): - Motion, force, work, energy - Sound, light (reflection, refraction) - Electricity and magnetism basics - Simple machines

Strategy: NCERT Class 9-10 Science + Class 11-12 Physics basics. NDA Physics is not JEE-level but requires clear fundamentals.

History and Geography (160 marks combined — very important!): - Indian history: Ancient, medieval, modern (Mughal period, British period, freedom struggle, independence) - World history: First/Second World War, decolonisation - Physical geography: Soil, climate, rivers, mountains of India - Economic geography: Agriculture, industries, resources of India

Strategy: Lucent's General Knowledge is an excellent single reference for History and Geography. NCERT Class 9-10 History and Geography textbooks.

Current Affairs (40 marks): - Last 6 months of important national and international news - Defence news (new weapons, exercises, postings) — very relevant for defence exam - Sports, awards, books, state news

Strategy: Monthly current affairs magazines + daily newspaper headlines. Defence news specifically (NDA/NDTV Defence section, Vivekananda's current affairs).

SSB Interview for NDA — The Final Hurdle

The SSB (Service Selection Board) interview is the most challenging part of the NDA selection process — far more than the written exam for most candidates:

SSB structure (5 days): Day 1 — Screening test: - Officer Intelligence Rating (OIR) test — verbal and non-verbal reasoning - Picture Perception and Description Test (PPDT) — write a story based on a hazy picture, then narrate to group - After Day 1, approximately 50% of candidates are screened out

Day 2 — Psychological tests: - Thematic Apperception Test (TAT): Write stories for 11 pictures + 1 blank slide - Word Association Test (WAT): Write first sentence that comes to mind for 60 words in 15 seconds each - Situation Reaction Test (SRT): React to 60 situational problems in 30 minutes - Self-Description Test (SD): Write what your parents, teachers, friends, and you think about yourself

Day 3–4 — Group Testing: - Group Discussion (GD): 2 group discussions - Group Planning Exercise (GPE): Tactical problem solving as a group - Progressive Group Tasks (PGT): Outdoor obstacle tasks requiring group coordination - Half Group Tasks (HGT): Smaller group obstacles - Individual Obstacles: 10 individual obstacles (climbing, jumping, balancing) - Command Task: Lead a team through an obstacle - Final Group Task: Culminating group obstacle

Day 5 — Interview: - Personal interview with an Interviewing Officer (IO) — 30–60 minutes - Based on PIQ (Personal Information Questionnaire) filled on Day 1

What SSB actually tests — the 15 OLQs (Officer Like Qualities): Effective intelligence, Reasoning ability, Organising ability, Power of expression, Social adaptability, Cooperation, Sense of responsibility, Initiative, Self-confidence, Ability to influence the group, Liveliness, Stamina, Determination, Courage and Daring, Speed of Decision.

SSB cannot be 'coached' in 2 weeks — start building leadership, confidence, and genuine personality from Class 9-10 onwards. Participate in NCC, sports, debate, public speaking. Read newspapers to build general awareness and opinion-forming ability.