CDS Exam Syllabus 2021 Released | Check & Download Syllabus for CDS
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CDS Exam Syllabus

CDS Exam Syllabus 2021:

Combined Defence Service (CDS) is an exam for those who want to serve their country. This exam is conducted by the UPSC, so this is among the toughest exams. This is a national exam. Hence, the number of students in this exam is much more than any state-level exam. However, the syllabus of the exam is designed so that every student can prepare for the exam.

The CDS Exam Syllabus 2020-2021 contains mainly three subjects English, General Knowledge, and Elementary Mathematics. There is no technical subject that is limited to the syllabus of any particular graduation course. The level of questions of a particular subject and the weightage of a particular subject depends upon the type of defence service you applied for. So, you should have the correct syllabus according to your service.

CDS Exam Syllabus 2021:

The CDS exam syllabus consists of mainly three subjects: English, General Knowledge, Elementary Mathematics. All the questions in the question paper are prepared from these subjects. However, the exam is a national level exam, so the difficulty level of the questions is very high. You need to learn every concept with enough practice.

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Following is the syllabus of the CDS exam:


Synonyms, Antonyms, Reading Comprehension, Para jumbles, Errors, Jumbled Sentences, Sentence Correction, Fill in the blanks

General Knowledge

History, Geography, Politics, Economics, Physics, Chemistry, Biology, Defence - related, Environment, Culture, Current Awareness, Sociology, Awards, Sports, Books, 

Elementary Mathematics

Arithmetics: Number system, Simple Interest, Compound Interest, Average, Time and distance, Time and work, Profit and loss, etc.

Algebra: Remainder Theorem, Theory of Polynomials, Solution of quadratic Equation, Relation Between roots and coefficients, etc.

Trigonometry: Simple Cases of heights and distances, Use of trigonometric tables, Simple trigonometric identities, etc.

Geometry: Lines and angles, Plane and plane figures, Similar triangles, Congruence of triangles, rectangle and squares, Properties of angles, etc.

Mensuration: Areas of squares, rectangles, parallelograms, etc, surface areas and volumes, lateral surface areas of different figures, Areas of figures, surface areas and volumes of the sphere, etc.

Statistics: Collection and tabulation of statistical data, Graphical representation, pie charts, histograms, bar charts, frequency polygons, etc.

How to Download the Syllabus:

Similar to other important information, the UPSC has also uploaded the CDS exam syllabus. Students can easily download the syllabus and prepare for the CDS Exam. The procedure is simple. Also, there are different websites that offer the CDS exam syllabus. But all the information is similar to that of the official website. So, it would be better to visit the official website.

The syllabus is only available through online mode. Also, the syllabus contains only the topics of different subjects. So, you should cover all the relevant concepts and questions. Because this will complete the topic. In the competition examination, you have to prepare all the applications of a topic. The CDS exam is very tough, so you should cover the same syllabus from different books.

Below are the steps to download the CDS Exam Syllabus 2021: 

  • Visit the official website of the UPSC (
  • Check the menu bar in the homepage and click on the Examination option.
  • A list of options will appear on the screen, click on the revised syllabus and scheme.
  • You will be directed to another page. Click on the link related to the CDS exam syllabus.
  • A pdf file will be opened which contains the CDS exam syllabus. Download the file for future use.

Best Books for Preparation:

The right study material is as important as the correct syllabus for the exam. You can not think of even qualifying the exam if you don’t have the correct study material. You should have deep knowledge of all the concepts to qualify for the exam. Books that are designed for the examination contain every important topic with a deep explanation. Also, it should have questions similar to that which are asked in the examination. 

Following are the most recommended books for CDA exam 2021:


  • Objective General English by Arihant
  • Objective General English by RS Aggarwal
  • Word Power made easy by norman lewis

General Knowledge

  • Manorama Year Book
  • Lucent’s General Knowledge
  • Competition in Focus

Elementary Mathematics

  • Arihant Pathfinder
  • Quantum CAT by Sarvesh Verma
  • Mathematics for CDS by RS Aggarwal
  • Quantum Aptitude for Examination

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