NDA Syllabus 2026 – Written Exam Pattern, Topics and SSB Breakdown
NDA has two completely different selection components that require completely different preparation. The written exam (1,200 marks total — Maths + GAT) is pure academics, tested in 5 hours. The SSB interview (900 marks, 5 days) has nothing to do with your marks — it tests officer-like qualities: leadership, communication, teamwork, decision-making under ambiguity. Candidates who clear the written but fail SSB repeatedly are making a preparation error: they treat NDA as a single exam when it is actually two very different ones.
👉 NDA Eligibility 2026 — age limits, PCM requirement, physical standards
Written Exam Pattern
| Paper | Subject | Marks | Duration | Questions |
|---|---|---|---|---|
| Paper I | Mathematics | 300 | 2.5 hours | 120 (2.5 marks each) |
| Paper II | General Ability Test (GAT) | 600 | 2.5 hours | 150 |
| — Part A: English | 200 | 50 | ||
| — Part B: General Knowledge | 400 | 100 | ||
| Total | Written Exam | 900 | 5 hours | 270 |
| SSB Interview | Intelligence + Personality | 900 | 5 days | — |
| Grand Total | — | 1,800 | — | — |
Negative marking: 0.33 marks deducted per wrong answer in Maths; 0.33 in GAT. The written exam carries 900 of the 1,800 total marks — exactly 50%. SSB carries the other 50%. Most candidates spend 90% of their preparation on the written, then walk into SSB with 5 days of preparation. That split doesn't reflect the actual mark distribution.
Mathematics — Topic-Wise Breakdown
NDA Maths is Class 11–12 level with emphasis on speed and accuracy. The question paper has 120 questions in 150 minutes — 75 seconds per question. There is no partial credit. The topic distribution in recent papers:
| Topic | Approx Questions | NCERT Class |
|---|---|---|
| Algebra (sets, relations, quadratics, progressions) | 15–18 | 11 |
| Matrices and Determinants | 6–8 | 12 |
| Trigonometry | 12–15 | 11–12 |
| Analytical Geometry (2D and 3D) | 15–18 | 11–12 |
| Differential Calculus | 10–12 | 12 |
| Integral Calculus and Differential Equations | 10–12 | 12 |
| Vector Algebra | 6–8 | 12 |
| Statistics and Probability | 6–8 | 11–12 |
| Miscellaneous (complex numbers, binomial) | 8–10 | 11 |
The highest-yield topics by marks-per-preparation-time are Trigonometry, Differential Calculus, and Analytical Geometry. These three areas together typically contribute 35–40 questions. Candidates who are weak in Calculus specifically struggle disproportionately because calculus questions are distributed across Differential Calculus, Integral Calculus, and implicitly in 3D Geometry problems.
GAT Part B (General Knowledge) — Topic Breakdown
| Section | Approx Questions | What It Tests |
|---|---|---|
| Physics | 20–25 | Mechanics, optics, electricity — Class 11–12 level |
| Chemistry | 10–15 | Periodic table, reactions, electrochemistry |
| General Science (Biology) | 10–12 | Human body, nutrition, disease |
| History and Freedom Movement | 10–12 | 1857 onwards, constitutional development |
| Geography | 10–15 | Indian geography, climate, physical features |
| Current Events | 10–15 | Defence news, science news, national events |
Physics in NDA GAT is the hardest science section — questions require conceptual understanding, not just recall. "A ball is thrown at 45° — find the range" type questions appear regularly. Current events in NDA specifically favour defence and science news: missile launches, defence procurement, space missions, and recent military exercises. Students who read The Hindu or PIB daily for 6 months before the exam have a systematic advantage here.
SSB Interview — The 5-Day Process
SSB (Services Selection Board) is a 5-day process at one of the SSBs across India (Allahabad, Bhopal, Bangalore, Mysore, Jalandhar, Dehradun, Varanasi). It has two stages:
Stage 1 (Day 1): Screening. Two tests: OIR (Officer Intelligence Rating) — verbal and non-verbal intelligence tests — and PPDT (Picture Perception and Description Test). In PPDT, you see a blurred image for 30 seconds, write a story about it, and then narrate it in a group. Stage 1 screens approximately 40–60% of candidates out on Day 1. If you don't clear Stage 1, you leave SSB that day.
Stage 2 (Days 2–5): Three parallel assessors evaluate you simultaneously — a Psychologist, a GTO (Group Testing Officer), and an Interviewing Officer. All three must independently recommend you for selection.
Psychology tests (Day 2): TAT (Thematic Apperception Test — write stories about 11 images + 1 blank), WAT (Word Association Test — write one word or sentence for each of 60 words in 15 seconds each), SRT (Situation Reaction Test — respond to 60 situations in 30 minutes), and Self Description (write what your parents, teachers, friends, and you yourself think about your qualities).
GTO tasks (Days 3–4): Group Planning Exercise, Progressive Group Tasks (outdoor physical tasks in groups), Half Group Task, Lecturette (3-minute impromptu speech on a given topic), Command Task (lead a team to complete a task), Individual Obstacles, Final Group Task.
Personal Interview (Day 3 or 4): 30–45 minutes with an Interviewing Officer. Covers your background, hobbies, current events, service motivation, self-awareness.
Conference (Day 5): All three assessors meet. The final recommendation is unanimous — if any one of the three doesn't recommend you, you are not selected regardless of how well you did with the other two.
Frequently Asked Questions
Q: What is the NDA written exam cutoff?
UPSC doesn't publish the exact cutoff in advance. In recent years (NDA I and II 2024–25), the combined written cutoff for SSB call-up was approximately 360–390 out of 900. Among candidates who appeared for SSB, the final merit list cutoff was 700–720 out of 1800. These numbers shift by ±20–30 marks each cycle.
Q: How many attempts are allowed in NDA?
You can apply as long as you meet the age criterion. For NDA I 2026 (Army/Navy): candidates born between July 2, 2007 and July 1, 2009 are eligible. For Air Force (NDA I 2026): same window. Most candidates get 2–3 NDA attempts before aging out at 19.5 years. There is no official "attempt limit" — only the age window matters.
Q: Is Maths Paper I compulsory even for Air Force and Navy?
Yes — all three services (Army, Navy, Air Force) use the same written exam. Paper I Maths is compulsory for all. The minimum qualifying marks in Maths were 25% (75/300) in recent cycles, but cutoffs in practice are much higher.
Q: What happens if I clear written but fail SSB?
You get another chance — as long as you are within the age limit. There is no penalty for failing SSB. Many officers cleared SSB on their second or third attempt after their first failure. The key is using the time between attempts to actively develop: joining an NCC unit, taking up team sports, doing public speaking, leading activities at school or college. SSB evaluates actual qualities, not performed qualities — you can't fake it for 5 days.
SSB Psychology Tests — What the Psychologist Is Actually Looking For
The Psychology tests at SSB are not knowledge tests — they are projective tests. The psychologist is not checking what you know; they are checking your thought patterns, values, and personality through the stories you tell and the words you associate. Understanding this changes how you should approach them.
TAT (Thematic Apperception Test): You see 11 blurry images (plus one blank card) and write a story about each in approximately 3–4 minutes. The pattern that gets you recommended: your protagonist faces a problem, does something constructive to solve it, and achieves a positive outcome. The patterns that hurt you: your protagonist is passive (things happen to them, they don't act), the story ends ambiguously or negatively, or the protagonist succeeds through luck rather than effort. The psychologist reads hundreds of TAT stories — stories with passive heroes or negative endings stand out negatively.
WAT (Word Association Test): You see a word on screen for 15 seconds and write one meaningful sentence. The evaluation isn't about whether your sentence is grammatically correct — it's about whether your association is positive, mature, and action-oriented. For the word "failure": "Failure teaches us more than success and motivates better preparation" scores better than "Failure is demotivating." For the word "jungle": associating it with adventure, nature, or resilience is better than threat or fear. The WAT is fast — 60 words in 15 minutes — which means your instinctive associations matter more than your deliberate ones.
SRT (Situation Reaction Test): 60 situations in 30 minutes (30 seconds per situation). You describe what you would do. The scoring favours responses that are practical, immediate, team-oriented, and confident. A situation like "Your vehicle breaks down 20 km from the nearest town at night" — a good response is action-focused: check tools, assess repair possibility, contact help, guide traffic if needed. A poor response is passive: wait for help.
GTO Tasks — Common Mistakes That Get Candidates Screened Out
The Group Testing Officer watches 8–10 candidates do physical and planning tasks together for two days. What gets candidates screened out has almost nothing to do with physical ability:
Dominating without listening: In Group Planning Exercise and Group Discussion segments, candidates who talk the most are not always scored highest. The GTO watches whether you build on others' ideas or only push your own. Interrupting team members repeatedly is a negative signal — it suggests low emotional intelligence, not leadership.
Being physically strong but planning-weak: In Progressive Group Tasks (outdoor obstacle tasks), teams are given physical challenges that require both physical effort and planning. The candidate who charges at obstacles without planning the approach scores lower than one who takes 30 seconds to assess the situation and suggest a method — even if the method doesn't work perfectly.
Disappearing in the Command Task: In the Command Task, you lead a small team to accomplish a specific objective. Candidates who choose the easiest possible task or give instructions without participating are negatively marked. The GTO wants to see someone who engages: picks a challenging task, leads by example, adjusts when the approach isn't working.
Preparation Timeline — Realistic 12-Month Plan
Assuming you are in Class 11 with NDA I in April of Class 12:
Months 1–6 (Class 11): Cover NCERT Maths thoroughly — all chapters listed in the NDA syllabus. Don't start NDA-specific coaching yet; the foundation is the same as your board preparation. Do 10 timed mock tests on NDA pattern Maths by Month 6 to calibrate your speed.
Months 7–10 (Class 12, first half): Start GAT preparation in parallel with board prep. Focus on Physics (20–25 questions in paper). Track defence news and science news weekly. Read one editorial in English daily — this directly feeds your English comprehension and writing skills for the written exam and later for SSB interview.
Months 11–12 (pre-NDA exam): Full mock tests — 5 hours continuous (Paper I + Paper II back to back). Don't take mock tests section by section — take them end-to-end. Your performance at hour 5 is what the exam hall will look like.
SSB preparation should start in parallel from Month 1, not after you clear the written. Join NCC, take up team sports, do public speaking — these are not things you can cram in the 3 weeks between written result and SSB call letter.
