NDA Mock Test 2027 - free, defense entrance pattern, Class 12 eligibility

The NDA exam is the gate for the National Defence Academy - the joint officer-cadet entry into the Indian Army, Navy and Air Force for 16.5-19.5 year-olds straight out of Class 12 PCM. UPSC conducts the written stage twice a year (April and September) in two papers - Maths (120Q, 300 marks) and GAT (150Q, 600 marks), 2.5 hours each, 1/3 negative marking. Our mock mirrors that structure exactly, free and unlimited.

What the NDA actually is - and is not

The National Defence Academy at Khadakwasla, Pune is the only fully-joint officer training academy in India for the three armed services - Army, Navy and Air Force. NDA cadets train together for three years on a single campus before splitting to the Indian Military Academy (Army), Indian Naval Academy (Navy) or Air Force Academy (Air Force) for a final year of service-specific training. The NDA exam, conducted by UPSC, is how candidates aged 16.5 to 19.5 enter that pipeline straight out of school. There is no graduate-level equivalent of NDA - if you missed the age window or want to come in after a degree, the route is CDS (graduate-level defence entry, also UPSC-conducted) or AFCAT (for the Air Force, conducted separately).

That is the single most useful clarification to make at the start of NDA prep. NDA is a distinct exam, distinct in syllabus from CDS (which is graduate-level and has English / GK / Elementary Maths), distinct in age band, distinct in academy structure, and distinct in the route to a commission. A common confusion is that NDA and CDS are tiers of difficulty - they are not. They are parallel entry points at different ages, with different syllabi, and the choice between them is decided by your age and whether you are still in / just finished Class 12 (NDA) or are already a graduate (CDS). The other Class-12-direct route into the armed forces is TES-10+2 for the Army, which is a separate process run by the Army itself, not by UPSC.

NDA written stage: paper structure

The NDA written stage is two objective papers on the same day, with a break between them. Both papers are 1/3 negative marking, both are OMR-based, and both must be cleared together - there is no partial qualification across a cycle. The full structure is below.

A key marks-weighting fact to internalise early: GAT carries twice the marks of Maths (600 vs 300), and within GAT, the GK section (400 marks) is weighted twice the English section (200 marks). The merit list out of the written stage is built on the 900-mark total, so a strong GAT score with a passable Maths score is a more reliable cut-off-clearer than a strong Maths score with a weak GAT - but in practice the written cut-off has minimum-marks requirements in each paper individually, so you cannot let either Maths or GAT drop below the floor. The mock surfaces both - the weighted total and the per-paper percentile - so you can see immediately whether a tactic of leaning into one paper is actually working.

Maths Paper I: what is tested

NDA Maths is broadly Class 11 + 12 syllabus with a small additional surface around vectors, statistics and probability that some boards cover lightly. The 120 questions over 2.5 hours work out to 75 seconds per question on average, but in practice the routine algebra and trig questions take 30-60 seconds each and the harder calculus / coordinate geometry / vector questions take 2-4 minutes, so pace management within the paper is itself a skill.

PCM Class 12 students - the eligibility group for the Air Force and Navy tracks of NDA - will recognise this surface as a near-overlap with their board syllabus plus a thin extension. PCB Class 12 students - eligible only for the Army track - will have a larger gap on calculus and vectors and should plan accordingly.

GAT Paper II: English + GK

GAT is two sections in one paper: English (200 marks, ~50 questions of 4 marks each) and General Knowledge (400 marks, ~100 questions of 4 marks each). The GK section is itself a multi-subject bucket - Physics, Chemistry, General Science, Geography, History, Current Affairs - with no formal sub-time, so the order in which you attack it is a strategy choice.

• English (~50Q / 200 marks): grammar, vocabulary, comprehension passages, sentence improvement, antonyms/synonyms. The level is broadly Class 12 board English with a slight competitive-exam tilt toward error-spotting and idiom usage.
• Physics (~25Q / 100 marks): Class 11-12 board level, with emphasis on mechanics, optics, thermodynamics and basic electromagnetism. Numerical-light, concept-heavy.
• Chemistry (~15Q / 60 marks): inorganic and organic basics, periodic table, common reactions, everyday-chemistry questions.
• General Science (~10Q / 40 marks): biology and applied science, often around defence-relevant tech and health basics.
• History & Freedom Movement (~20Q / 80 marks): ancient, medieval, modern India, with a heavy emphasis on the freedom movement and post-Independence history.
• Geography (~20Q / 80 marks): physical, Indian and world; geomorphology, climate, resources, maps.
• Current Affairs (~10Q / 40 marks): last 6-12 months, weighted toward defence-relevant developments - exercises, induction of equipment, government schemes, awards.

NDA twice a year - and what that means for prep

Unlike the Civil Services Exam, NDA is conducted twice a year - typically NDA I in April and NDA II in September. That gives Class 12 PCM students two distinct attempts in a calendar year, and three to four cumulative attempts across the 16.5-19.5 eligibility window. The implication for strategy is that NDA prep cycles are shorter and more iterative than CSE prep cycles - you do not need a 12-month single-shot plan; you can run a 4-5 month focused prep block toward an April or September attempt, see what your written stage looks like, and adjust before the next cycle.

A typical NDA candidate timeline looks like Class 11 - light prep on the Maths and English fundamentals while board exams are the priority. Class 12 first half - a serious push on the NDA-specific Maths surface (vectors, probability) and GAT GK; consider an NDA I attempt in April of the Class 12 board year, treating it primarily as a calibration attempt. Post-Class 12 - the NDA II in September after the board exam is usually the best-resourced attempt, with a full summer of focused prep. Many cadets who clear NDA describe the boards-and-NDA-together period as the hardest, and the post-boards focused window as the one where the cut-off-clearing score actually came.

Beyond the written: SSB, medical, physical

Clearing the NDA written cut-off only takes you to the Services Selection Board - the five-day SSB interview, which carries the same 900 marks as the entire written stage. SSB is structured across two days of screening (an OIR test and a Picture Perception & Discussion Test) followed by three days of psychological testing (TAT, WAT, SRT, SD), the Group Testing Officer's tasks (GD, GPE, PGT, HGT, IO, lecturette, command, snake race), and the Interviewing Officer's one-on-one interview. The final merit out of 1800 marks (900 written + 900 SSB) is what decides the academy allotment and the service.

After SSB, recommended candidates undergo a service-specific medical examination at a military hospital - the medical standards for the Air Force are the strictest (vision, anthropometry, cardiovascular), the Navy slightly less so, the Army the most lenient of the three. Physical fitness tests follow at the academy itself rather than at the selection stage, but a baseline of running, swimming and push-up capacity is assumed - cadets arriving at NDA are expected to run 2.4 km in under 10 minutes within weeks of induction. The mock here trains the written stage only; the SSB, medical and physical layers need parallel preparation through outdoor activity, NCC-style group activity if available, and standard SSB-prep material that we will link to in future updates.

Alternate routes if NDA is not the fit

NDA is one of several routes into the armed forces, not the only one. If NDA is not the right fit for reasons of age, syllabus comfort, or the three-year academy commitment, there are parallel options - and many aspirants run more than one in parallel.

• TES-10+2 (Technical Entry Scheme): Army-only, post-Class 12 PCM with 60%+, leads to a 5-year tech-officer training pipeline through Indian Military Academy and a specialist technical training school. Separate process run by the Indian Army, not UPSC. Useful for PCM Class 12 students who narrowly miss NDA age cut-off or who want a guaranteed Army-tech route.
• CDS (Combined Defence Services): graduate-level entry into IMA, INA, AFA and OTA - also conducted by UPSC, thrice a year (not three times; CDS was historically twice a year and recently moved to three cycles in several calendar years). Three written subjects (English, GK, Elementary Maths; OTA candidates skip Maths). See our UPSC pattern page for the full CDS breakdown.
• AFCAT: Air Force only, graduate-level, conducted by the Indian Air Force (not UPSC), twice a year. Recruits into flying, ground duty technical and ground duty non-technical branches. The closest graduate-level analogue to the NDA Air Force route.
• Direct Entry SSC:various Short Service Commission entries for the Army, Navy and Air Force, post-graduation, for non-permanent officer service of 10-14 years.

Why this mock matches the real OMR exam

The NDA mock on upscmocks is built to mirror the live UPSC paper across the four loadbearing variables. The syllabus is the UPSC-published NDA syllabus, refreshed against the most recent notification. Question style is calibrated against the last several NDA I and NDA II cycles - the numerical phrasing, the option distractor pattern in Maths, the comprehension-passage length in English, the current-affairs anchoring of GK questions. Marking is exact: +4 / -1.33 (i.e. one third of 4) on Maths, +4 / -1.33 on GAT, 0 on unattempted, no partial credit. Timing matches the live paper too - each paper has a continuous 150-minute server-side timer.

A small but important note: like all UPSC exams (and like Civil Services Prelims), NDA is an offline OMR-sheet test, not a computer-based test. The mock here is a screen-based simulation - structure, marking and timing are exact, but the input modality is different. For your final two or three full-length mocks before the live exam, print an OMR sheet and do the mock with paper bubble-shading so your input time on exam day is calibrated. For the wider exam structure and the cut-off-clearing maths across UPSC exams, see our UPSC eligibility page and cut-off bands by exam.

After you finish: score and analysis

• Per-paper score: your raw mark out of 300 in Maths and 600 in GAT, with the 900-total and an estimated written cut-off band based on past-cycle cut-offs.
• GAT sub-scores: English and GK split out separately, with GK further broken into Physics / Chemistry / Science / History / Geography / Current sub-scores so a weak cluster is immediately visible.
• Maths topic-cluster review: wrong answers grouped by Algebra / Trig / Calculus / Coordinate / Vectors / Statistics so you can see whether a low Maths score came from one weak cluster or a diffuse spread.
• Time-spent heat-map: per-question time chart - the most common Maths failure mode is two or three calculus questions swallowing 8-10 minutes each and leaving no time for the final 15 routine algebra questions.
• Marking-discipline tag: every wrong answer tagged blind-guess / partial-elim / known-content-gap, the same way the Prelims mock review works - the 1/3 marking math is the same on NDA as on Prelims.

Where to go next

NDA is one of six UPSC exams we cover - Civil Services, CDS, NDA, CAPF, ESE and CMS. The pages below cover the structure, eligibility and cut-offs for all of them.

• UPSC pattern (all 6 exams) - stage-by-stage breakdown of CSE, CDS, NDA, CAPF, ESE and CMS, with marking schemes.
• UPSC eligibility - age limits and qualifications across CSE, NDA, CDS, CAPF, ESE and CMS, with the marital, physical and educational rules for the defence exams.
• CSE vs CDS vs NDA vs CAPF - the honest side-by-side: different careers, different age bands, not difficulty tiers of one exam.
• UPSC cut-offs - indicative bands for the written stage of each UPSC exam, plus the SSB qualifying standard for defence exams.