The NDA Exam serves as a gateway for candidates seeking a career in the Indian Army, Navy, and Air Force. The **National Defence Academy and Naval Academy Examination** is an entrance examination conducted by the Union Public Service Commission (UPSC) twice a year for admissions into the National Defence Academy (NDA) and Indian Naval Academy (INA).

**Eligibility**

**Citizenship**: Candidates must be Indian citizens.**Age Limit**: Candidates must be between 16.5 and 19.5 years of age.**Educational Qualification**: Candidates must have completed their 10+2 education from a recognized board or university.

**Examination Process**

The NDA Exam is conducted in two stages: a written examination and an interview by the Services Selection Board (SSB).

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### Written Examination of NDA

The written examination consists of two papers: Mathematics (2½ Hours 300Marks) and General Ability Test (GAT)( 2½ Hours 600Marks). Both papers are objective type and are conducted on the same day.

The Mathematics paper evaluates the candidates’ mathematical aptitude, while the GAT paper assesses their English language proficiency, general knowledge, and reasoning abilities. (Note – The candidates are not permitted to use calculator or Mathematical or logarithmic table for answering objective type papers (Test Booklets))

The papers in all the subjects will consist of objective type questions only. The question papers of Mathematics and part “b” of General ability test will be set bilingually in Hindi as well as English.

### Services Selection Board Interview

Candidates who qualify in the written examination are called for the Services Selection Board (SSB) interview. The SSB interview consists of various stages, including intelligence and personality tests, group discussions, psychological tests, and personal interviews. (900 Marks)

**HOW TO APPLY**

Candidates are required to apply online by using the website upsconline.nic.in. It is essential for the applicant to register himself/herself first at One Time Registration (OTR) platform, available on the Commission’s website, and then proceeds for filling up the online application for the examination. OTR has to be registered only once in life time. This can be done anytime throughout the year. If the candidate is already registered, he/she can proceed straightway for filling up the online application for the examination

Date of Commencement of Examination | 21/04/2024 |

Link for Registration | upsconline.nic.in |

Last Date for Receipt of Applications | 09/01/2024 – 6:00pm |

**The approximate number of vacancies to be filled :**

- National Defence Academy : Army – 208 (including 10 for female candidates)
- Navy – 42 (including 03 12 for female candidates)
- Air Force – (i) Flying – 92 (including 02 for female candidates)
- (ii) Ground Duties (Tech) – 18 (including 02 for female candidates)

- (iii) Ground Duties (Non Tech) – 10 (including 02 for female candidates)

- Naval Academy (10+2 Cadet Entry Scheme) : – 30 (including 09 for female candidate) Total : 400

Vacancies are provisional and may be changed depending on the availability of training capacity of National Defence Academy

**Scheme of Marking and Number of Questions**

There will be a total number of 270 questions asked in the examination (120 from Mathematics and 150 from the General Ability Test).

For every correct answer in Mathematics, 2.5 marks will be awarded. The full mark for this section is 300. There will be negative marking. The negative marking for each of the incorrect answers is ⅓ of 2.5 – that is 0.83.

For every correct answer in GAT, 4 marks will be awarded. The full mark for this section is 600. There will be negative marking. The negative marking for each of the incorrect answers is ⅓ of 4 – that is 1.33. The English Section will have 50 questions for 200 marks and the GK Section will have 100 questions for 400 marks. The total marks for the GAT paper would be 600.

**SYLLABUS OF THE EXAMINATION**

**PAPER-I – MATHEMATICS (Code No. 01) (Maximum Marks-300)**

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 linear 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 another function, derivative of a composite function. Second order derivatives. Increasing and decreasing functions. Application of derivatives in problems of maxima and minima.

- 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 a differential equations, solution of first order and first degree differential equations of various types—examples. Application in problems of growth and decay.

- 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 moment of a force and in geometrical problems.

- STATISTICS AND PROBABILITY :

Statistics : Classification of data, Frequency distribution, cumulative frequency distribution—examples. Graphical representation—Histogram, Pie Chart, frequency polygon— 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 space, 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.

**PAPER-II – GENERAL ABILITY TEST (Code No. 02) (Maximum Marks—600)**

**Part ‘A’—ENGLISH (Maximum Marks—200)**

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.

**Part ‘B’—GENERAL KNOWLEDGE (Maximum Marks—400)**

The question paper on General Knowledge will broadly 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 States of Matter, Mass, Weight, Volume, Density and Specific Gravity, Principle of Archimedes, Pressure Barometer. Motion 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 Electricity, conductors and Nonconductors, 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. Impact 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.**