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The UPSC CDS (Combined Defence Services) Exam is a significant opportunity for candidates looking to join the Indian Armed Forces. Held twice a year, this exam opens the door to prestigious positions in the Indian Military Academy (IMA), Indian Naval Academy (INA), Air Force Academy (AFA), and Officers Training Academy (OTA). This guide provides all the details you need for CDS 2025, including eligibility, exam dates, syllabus, application process, and preparation tips.
The CDS exam is conducted by the Union Public Service Commission (UPSC) in two phases: CDS I and CDS II. Candidates who qualify this exam will go through further rounds, such as the SSB (Service Selection Board) interview and a medical examination, to secure final selection in one of the academies.
The tentative dates for CDS I and CDS II in 2025 are:
CDS I
CDS II
Make sure to stay updated with the official UPSC website for any changes in dates and announcements regarding the CDS exam.
To be eligible for CDS 2025, candidates must meet the educational qualifications, age limits, and nationality requirements specific to each academy.
Note: Women candidates are eligible to apply only for OTA.
To apply for CDS 2025, follow these steps:
The CDS Exam Pattern varies slightly depending on the academy you’re applying for.
Note: All questions are multiple-choice, and there is a penalty for incorrect answers.
Here’s a breakdown of the topics for each section:
Focus on grammar, vocabulary, sentence structure, synonyms, antonyms, and comprehension passages.
Covers current events, Indian history, geography, political science, economics, and scientific advancements.
Topics include arithmetic, algebra, trigonometry, geometry, mensuration, and statistics.
The CDS selection process involves three stages:
Final Selection: The final merit list will be based on candidates’ performance in the written exam, SSB interview, and medical examination.
To excel in CDS 2025, a disciplined preparation strategy is essential:
Here are some popular books for CDS exam preparation:
The UPSC CDS 2025 exam is a golden opportunity for young aspirants looking to join the Indian Armed Forces. With careful planning and consistent preparation, you can increase your chances of success in this challenging yet rewarding career path. Remember to stay updated with official notifications, prepare diligently, and keep your motivation high.
| Mode of exam | Offline |
| Number of sections | Indian Military Academy (IMA), Indian Naval Academy (INA) and Air Force Academy (AFA) – Three Officers’ Training Academy (OTA) – Two |
| Total marks of the test | IMA, INA and AFA – 300 OTA – 200 |
| Nature of questions | Objective type |
| Language of question paper | Hindi and English |
| Duration of the test | 2 hours for each section of test |
| Subject | Duration | Maximum marks |
| English | 2 hours | 100 |
| General Knowledge | 2 hours | 100 |
| Elementary Mathematics | 2 hours | 100 |
| Subject | Duration | Maximum marks |
| English | 2 hours | 100 |
| General Knowledge | 2 hours | 100 |
Negative marking is applicable for every wrong marked answer. In CDS paper, each question carries 4 options and out of which only 1 option is correct. For each incorrect answer, 1/3 of the marks will be deducted. More than one option marked is treated as incorrect. However, if a question is left unanswered there will be no negative marking.
Candidates can check the UPSC CDS Syllabus in the table given below.
| Sections | Topics |
| English | * Spotting Errors Questions * Sentence Arrangement Questions * Synonyms & Antonyms * Selecting Words * Ordering of Sentence * Comprehension Questions * Ordering of words in a sentence * Fill in the blanks questions * Idioms and Phrases |
| General Awareness (GK) | * Economics * Physics * Current Affairs * Politics * Chemistry * Sociology * History * Defence related Award * Geography * Environment * Sport * Biology * Cultural * Book * Statement * true/false |
| Elementary Mathematics | * Basic Operations * simple factors * Remainder Theorem * H.C.F. * L.C.M. * Theory of polynomials * solutions of quadratic equations * relation between its roots and coefficients (Only real roots to be considered) * Simultaneous linear equations in two unknowns—analytical and graphical solutions * Simultaneous linear inequations in two variables and their solutions * Practical problems leading to two simultaneous linear equations or inequations in two variables or quadratic equations in one variable & their solutions * Set language and set notation * Rational expressions and conditional identities * Laws of indices | |
| Arithematic | * Number System: Natural numbers, Integers, Rational and Real numbers. * Fundamental operations: addition, substraction, multiplication, division, Square roots, Decimal fractions * Unitary method * time and distance * time and work * percentages * applications to simple and compound interest * profit and loss * ratio and proportion * variation * Elementary Number Theory: Division algorithm * Prime and composite numbers * Tests of divisibility by 2, 3, 4, 5, 9 and 11 * Multiples and factors. Factorisation Theorem * H.C.F. and L.C.M. * Euclidean algorithm * Logarithms to base 10 * laws of logarithms * use of logarithmic tables | |
| Trigonometry | * Sine ×, cosine ×, Tangent × when 0° < × < 90° * Values of sin ×, cos × and tan ×, for ×= 0°, 30°, 45°, 60° and 90° * Simple trigonometric identities * Use of trigonometric tables * Simple cases of heights and distances | |
| Geometry | * Lines and angles * Plane and plane figures * Theorems on Properties of angles at a point * Parallel lines * Sides and angles of a triangle * Congruency of triangles * Similar triangles * Concurrence of medians and altitudes * Properties of angles * sides and diagonals of a Parallelogram * rectangle and square * Circles and its properties including tangents and normals * Loci | |
| Mensuration | * Areas of squares * rectangles * parallelograms * triangle and circle * Areas of figures which can be split up into these figures (Field Book) * Surface area and volume of cuboids * lateral surface and volume of right circular cones and cylinders * surface area and volume of spheres | |
| Statistics | * Collection and tabulation of statistical data * Graphical representation frequency polygons * histograms * bar charts * pie charts etc * Measures of central tendency |
Ambedkar University – [AU], Delhi
Fateh Chand College for Women, Hisar
Fateh Chand College for Women, Hisar
Management Development Institute , Gurgaon
Al-Falah University
Guru Nanak Dev Engineering College , Ludhiana
CRM JAT College, Hisar
