NDA (National Defence Academy) Exam details, Exam Dates, Syllabus/Pattern, Eligibility Criteria 2021

NDA exam

UPSC conducts the National Defense Academy Exam to hire officer for the post and vacancies in the NDA Army, Navy, and Air Force wings. This exam is a gateway for candidates who want to join the Defense Forces, i.e Army, Navy, and Air Force as well.

This is a national exam that is conducted twice a year – NDA I and NDA II to help candidates pursue careers in defence services. UPSC has already released the NDA 2020 exam times for the NDA I and NDA II exams. UPSC conducts a lot of defence exams, you can check out in UPSC page linked in this article.

The 2021 Exam from the National Defense Academy and Naval Academy will be a two-step process where candidates must first take the exam and then grade the SSB interview conducted by the Service Selection Board.

NDA I 2021 will take place on April month of 2021, while NDA II will take place on September month of 2021. Therefore, candidates planning to take the exam must complete the application form before the last date and begin preparation for the NDA I & NDA II 2021 exam.

The UPSC is solely responsible for issuing guidelines for the selection and final completion of the entrance exam.

NDA (II) Notification 2021 available soon. The notice possibly schedules in the June month but was delayed.

Candidates can complete the application form for NDA II until July month. In 2020, Exams for NDA I and II will take place on the same day in September 2020. Candidates applying for NDA I can also apply for NDA II.

The results of NDA I and II are declared separately. The NDA I exam was scheduled for April 19, 2020. The exam was postponed due to the COVID-19 pandemic.

The NDA I notification and application form might get published in January 2021. Candidates can fill out and submit an application form for NDA I until January month.

SSB Exam EventsSSB Exam Dates 2020
SSB Exam Events8 Jan ’20
NDA 1 2020 exam notification release8 Jan ’20
Last date to apply for NDA 128 Jan ’20
Release of NDA 2 application form16 Jun ’20
Last date of offline fee payment5 Jul ’20
Last date of registration6 Jul ’20
NDA 2 exam6 Sep ’20
NDA 1 exam 20206 Sep ’20
NDA (I) admit card 2020Aug ’20
NDA 2 admit card 2020Aug ’20
Application withdrawal facility13 Jul 2020 – 17 Jul 2020

NDA 2021 recruitment process

Here through these below-mentioned points, the selection procedure of Sashastra Seema Bal(NDA) will be very clear to you.

The selection procedure of Sashastra Seema Bal is very long. As a result, it takes around one year to complete the whole process.

The official nodes on the official website give accurate information about the number of vacancies, last date of form filling, etc.

Through the official website(upsc.gov.in), one can fill the form of application.

First of all, the total number of vacancies for Sashastra Seema Bal depends upon the need for security forces.

When the demand decreases consequently, the vacancies decreases and as the demand increases the vacancies increases.

It is very very liable on the UPSC to make a sudden change in the vacancies during the recruitment process of Sashastra Seema Bal.

SSB Test PatternMarksDuration
Written Test
Paper I: General Ability/ Intelligence
Paper-II: General Studies, Essay and Comprehension
2 hours
3 hours
250 marks
250 marks
Physical Efficiency Test
Personality Test150 marks

NDA Salary Structure Posts Details 2021

Candidates selected for the NDA jobs gets a very handsome salary along with the good allowances.

The candidate gets the post in the ARMY, NAVY, AIR FORCE according to its performance in the NDA-I and NDA-II examination along with the interview process. Basically, performance in the selection process. In the table below the third section gives the information of exact salary.

Events or PositionsPayable amount
Stipend during the training of the candidates in IMAINR 56,100/- Per Month
LieutenantINR 56,100/- to INR 1,77, 500/- Per Month
CaptainINR 61,300/- to 01,93,900/- Per Month
MajorINR 69,400/- to 02,07,200/- Per Month
Lieutenant ColonelINR 01,21,200/- to 02,12,400/- Per Month
ColonelINR 01,30,600/- to 02,15,900/- Per Month
BrigadierINR 01,39,600/- to 02,17,600/- Per Month
Major GeneralINR 01,44,200/- to 02,18,200/- Per Month
Lt. General HAG ScaleINR 01,82,200/- to 02,24,100/- Per Month
HAG+ ScaleINR 02,05,400/- To 02,24,400/- Per Month
VCOAS/ Army Cdr/ Lt Gen (NFSG)INR 02,25,000/- Per Month Fixed
COASINR 02,50,000/- Per Month Fixed


Min. Service required for PromotionsPositions
On Commission

Army- Lieutenant

Navy- Sub Lieutenant

Air Force- Flying Officer

02 years

Army- Captain

Navy- Lieutenant

Air Force- Flight Lieutenant

06 Years

Army- Major

Navy- Lt. Commander

Air Force- Squadron Leader

13 years

Army- Lt. Colonel

Navy- Commander

Air Force- Wing Commander

On Selection

Army- Colonel (Selection)

Navy- Captain (Selection)

Air Force- Group Captain (Selection)

26 Years

Army- Colonel (Time Scale)

Navy- Captain (Time Scale)

Air Force- Group Captain (Time Scale)

On Selection

Army- Brigadier

Navy- Commodore

Air Force- Air Commodore

On Selection

Army- Major General

Navy- Rear Admiral

Air Force- Air Vice-Marshal

On Selection

Army- Lieutenant General

Navy- Vice Admiral

Air Force- Air Marshal

On Selection

Army- General

Navy- Admiral

Air Force- Air Chief Marshal

NDA (I) & (II) Examination Pattern 2021

The National Defense Academy exam pattern is designed to assess a candidate’s academic experience and that candidate’s ability to present themselves in a systematic and consistent manner.

The test pattern aims to assess the general intellectual traits and the level of understanding of the candidates.

The 2020 Exam is a National Defense Academy conducted in two stages, namely Part I, Part II, which are then followed by an interview.

  • NDA and NA-I
  • NDA and NA-II
  • Interview/personality test
SubjectCodeDurationMaximum Marks
Part I – NDA and NA Examination (I)
Mathematics012.5 Hrs300
General Ability Test022.5 Hrs600
Part II – SSB Test/Interview900
Part I – NDA and NA Examination (II)
General Ability Test012.5 Hrs300
Mathematics022.5 Hrs600
Part II – SSB Test/Interview900

Points to remember: –

  • Papers in all subjects will consist only of objective questions.
  • The Mathematics Question Papers (Test Booklets) and Part ‘B’ of the General Ability Test will be set up bilingual (able to speak two languages fluently) in Hindi and English.
  • In the question documents, whenever necessary, only questions related to the metric system of Weights and measures will be established.
  • Candidates must write the documents in their own hands. In no case will the help of a scribe be allowed to write answers for them.
  • The Commission has the discretion to set grades for any or all of the subjects on the exam. Candidates cannot use the calculator or the mathematical or logarithmic table to answer objective type documents (test booklets). Therefore, they should not bring the same into the exam room.

National Defence Academy Exam Syllabus 2021

NDA (I) & (II) Syllabus 2021


1.ALGEBRA : Concept of set, operations on sets, Venn diagrams. De Morgan laws, Cartesian product, relation, equivalence relation.

Representation of real numbers on a line. Complex numbers – basic properties, modulus, argument, cube roots of unity. Binary system of numbers. Conversion of a number in decimal system to binary system and vice-versa. Arithmetic, Geometric and Harmonic progressions. Quadratic equations with real coefficients. Solution of liner inequations of two variables by graphs. Permutation and Combination. Binomial theorem and its applications. Logarithms and their applications.

2. MATRICES AND DETERMINANTS : Types of matrices, operations on matrices. Determinant of a matrix, basic properties of determinants. Adjoint and inverse of a square matrix, Applications-Solution of a system of linear equations in two or three unknowns by Cramer’s rule and by Matrix Method.

3. TRIGONOMETRY : Angles and their measures in degrees and in radians. Trigonometrical ratios. Trigonometric identities Sum and difference formulae. Multiple and Sub-multiple angles. Inverse trigonometric functions. Applications-Height and distance, properties of triangles.

4. ANALYTICAL GEOMETRY OF TWO AND THREE DIMENSIONS : Rectangular Cartesian Coordinate system. Distance formula. Equation of a line in various forms.

Angle between two lines. Distance of a point from a line. Equation of a circle in standard and in general form. Standard forms of parabola, ellipse and hyperbola. Eccentricity and axis of a conic. Point in a three dimensional space, distance between two points. Direction Cosines and direction ratios. Equation two points. Direction Cosines and direction ratios. Equation of a plane and a line in various forms. Angle between two lines and angle between two planes. Equation of a sphere.

5. DIFFERENTIAL CALCULUS : Concept of a real valued function-domain, range and graph of a function. Composite functions, one to one, onto and inverse functions. Notion of limit, Standard limits – examples. Continuity of functions – examples, algebraic operations on continuous functions. Derivative of function at a point, geometrical and physical interpretation of a derivative-applications. Derivatives of sum, product and quotient of functions, derivative of a function with respect to anothe function, derivative of a composite function. Second order derivatives. Increasing and decreasing functions. Application of derivatives in problems of maxima and minima.

6. INTEGRAL CALCULUS AND DIFFERENTIAL EQUATIONS : Integration as inverse of differentiation, integration by substitution and by parts, standard integrals involving algebraic expressions, trigonometric, exponential and hyperbolic functions. Evaluation of definite integrals – determination of areas of plane regions bounded by curves – applications. Definition of order and degree of a differential equation, formation of a differential equation by examples. General and particular solution of adifferential equations, solution of first order and first degree differential equations of various types – examples. Application in problems of growth and decay.

7. VECTOR ALGEBRA : Vectors in two and three dimensions, magnitude and direction of a vector. Unit and null vectors, addition of vectors, scalar multiplication of a vector, scalar product or dot product of two vectors. Vector product or cross product of two vectors. Applications – work done by a force and movement of a force and in geometrical problems.


  • Statistics : Classification of data, Frequency distribution, cumulative frequency distribution – examples. Graphical representation – Histogram, Pie Chart, frequency polugon – examples. Measures of Central tendency – Mean, median and mode. Variance and standard deviation – determination and comparison. Correlation and regression.
  • Probability : Random experiment, outcomes and associated sample spaces, events, mutually exclusive and exhaustive events, impossible and certain events. Union and intersection of events. Complementary, elementary and composite events. Definition of probability – Classical and Statistical – examples. Elementary theorems on probability – simple problems. Conditional probability, Bayes’ theorem – simple problems. Random variable as function on a sample space. Binomial distribution, examples of random experiments giving rise to Binominal distribution.

Part ‘A’  ENGLISH :

  • The question paper in English will be designed to test the candidate’s understanding of English and workman like use of words.
  • The syllabus covers various aspects like : Grammar and usage, vocabulary, comprehension and cohesion in extended text to test the candidate’s proficiency in English.


  • The question paper on General Knowledge will boardly cover the subjects : Physics, Chemistry, General Science, Social Studies, Geography and Current Events.
  • The syllabus given below is designed to indicate the scope of these subjects included in this paper.
  • The topics mentioned are not to be regarded as exhaustive and questions on topics of similar nature not specifically mentioned in the syllabus may also be asked. Candidate’s answers are expected to show their knowledge and intelligent understanding of the subject.

Section ‘A’ (Physics) :

  • Physical Properties and State of Matter, Mass, Weight, Volume, Density and Specific Gravity, Principle of Archimedes, Pressure Barometer.
  • Mation of objects, Velocity and Acceleration, Newton’s Laws of Motion, Force and Momentum, Parallelogram of Forces, Stability and Equilibrium of bodies, Gravitation, elementary ideas of work, Power and Energy. Effects of Heat, Measurement of Temperature and Heat, Change of State and Latent Heat, Modes of transference of Heat. Sound Waves and their properties, Simple musical instruments. Rectilinear propagation of Light, Reflection and refraction. Spherical mirrors and Lenses, Human Eye. Natural and Artificial Magnets, Properties of a Magnet, Earth as a Magnet.
  • Static and Current Electrictiy, conductors and Non-conductors, Ohm’s Law, Simple Electrical Circuits, Heating, Lighting and Magnetic effects of Current, Measurement of Electrical Power, Primary and Secondary Cells, Use of X-Rays. General Principles in the working of the following :
  • Simple Pendulum, Simple Pulleys, Siphon, Levers, Balloon, Pumps, Hydrometer, Pressure Cooker, Thermos Flask, Gramophone, Telegraphs, Telephone, Periscope, Telescope, Microscope, Mariner’s Compass; Lightening Conductors, Safety Fuses.

Section ‘B’ (Chemistry) :  

  • Physical and Chemical changes. Elements, Mixtures and Compounds, Symbols, Formulae and simple Chemical Equations, Law of Chemical Combination (Excluding Problems). Properties of Air and Water.
  • Preparation and Properties of Hydrogen, Oxygen, Nitrogen and Carbondioxide, Oxidation and Reduction. Acids, bases and salts. Carbon – different forms. Fertilizers – Natural and Artificial. Material used in the preparation of substances like Soap, Glass, Ink, Paper, Cement, Paints, Safety Matches and Gun-Powder. Elementary ideas about the structure of Atom, Atomic Equivalent and Molecular Weights, Valency.

Section ‘C’ (General Science) :  

  • Difference between the living and non-living. Basis of Life – Cells, Protoplasms and Tissues.
  • Growth and Reproduction in Plants and Animals.
  • Elementary knowledge of Human Body and its important organs. Common Epidemics, their causes and prevention.
  • Food – Source of Energy for man. Constituents of food, Balanced Diet. The Solar System – Meteors and Comets, Eclipses. Achievements of Eminent Scientists.

Section ‘D’ (History, Freedom Movement etc) :  

  • A broad survey of Indian History, with emphasis on Culture and Civilisation.
  • Freedom Movement in India. Elementary study of Indian Constitution and Administration. Elementary knowledge of Five Year Plans of India. Panchayati Raj, Co-operatives and Community Development. Bhoodan, Sarvodaya, National Integration and Welfare State, Basic Teachings of Mahatma Gandhi.
  • Forces Shaping the modern world; Renaissance, Exploration and Discovery; War of American Independence. French Revolution, Industrial Revolution and Russian Revolution. Impace of
  • Science and Technology on Society. Concept of one World, United Nations, Panchsheel, Democracy, Socialism and Communism. Role of India in the present world.

Section ‘E’ (Geography) :  

  • The Earth, its shape and size. Lattitudes and Longitudes, Concept of time. International Date Line. Movements of Earth and their effects. Origin of Earth. Rocks and their classification; Weathering – Mechanical and Chemical, Earthquakes and Volcanoes. Ocean Currents and Tides Atmosphere and its composition; Temperature and Atmospheric Pressure, Planetary Winds, Cyclones and Anti-cyclones; Humidity; Condensation and Precipitation; Types of Climate, Major Natural regions of the world. Regional Geography of India – Climate, Natural Vegetation. Mineral and Power resources; location and distribution of agricultural and Industrial activities. Important Sea ports and main sea, land and air routes of India. Main items of Imports and Exports of India.

Section ‘F’ (Current Events) :  

  • Knowledge of Important events that have happened in India in the recent years. Current important world events. Prominent personalities – both Indian and International including those connected with cultural activities and sports.

NOTE : Out of maximum marks assigned to part ‘B’ of this paper, questions on Sections ‘A’, ‘B’. ‘C’, ‘D’, ‘E’ and ‘F’ will carry approximately 25%, 15%, 10%, 20%, 20% and 10% weightages respectively.

Intelligence and Personality Test :  

The SSB procedure consists of two stage selection process – Stage I and Stage II. Only those candidates who clear the stage I are permitted to appear for Stage II. The details are :

  • StageI comprises of Officer Intelligence Rating (OIR) tests are Picture Perception * Description Test (PP&DT). The Candidates will be shortlisted based on combination of performance in OIR Test and PP&DT.

  • Stage II Comprises of Interview, Group Testing Officer Tasks, Psychology Tests and the Conference.These tests are conducted over 4  The details of these tests are given on the website joinindianarmy.nic.in.

  • The personality of a candidate is assessed by three different assessors viz. The Interviewing Officer (IO), Group Testing Officer (GTO) and the Psychologist. There are no separate weightage for each test. The mks are allotted by assessors only after taking into consideration the performance of the candidate holistically in all the test. In addition, marks for Conference are also allotted based on the initial performance of the Candidate in the three technique and decision of the Board. All these have equal weightage.
  • The various tests of IO, GTO and Psych are designed to bring out the presence / absence of Officer Like Qualities and their trainability in a candidate. Accordingly candidates are Recommended or Not Recommended at the SSB.