CDS - Syllabus

Combined Defence Services Examination

Pen & Paper Mode

CDS 1 2021 Syllabus: Download Syllabus Pdf, Subject wise Syllabus

Updated On - January 11 2021 by Anusha Pachauri

CDS 1 2021 Syllabus is released by Union Public Service Commission (UPSC) on the official website. It is a national level entrance exam conducts for candidates who wish to be a part of Indian Military Academy, Indian Naval Academy, Indian Air Force, and Officer Training Academy. The CDS exam is organized twice a year, CDS 1 and CDS 2. CDS exam will be held on 07 February 2021. The candidates who wish to join CDS can go through the complete article to get all the important information related to CDS 2021 Syllabus for the entrance exam and can also download CDS 2021 Syllabus pdf.

CDS 1 2021 Syllabus

Candidates can check the CDS 1 2021 syllabus subject wise given below:

English Syllabus
  • The question paper will be designed to test the candidates’ understanding of English and workmanlike use of words. 
General Knowledge Syllabus
  • General Knowledge including knowledge of current events and of such matters of everyday observation and experience in their scientific aspects as may be expected of an educated person who has not made a special study of any scientific subject.
  • The paper will also include questions on History of India and Geography of nature which candidate should be able to answer without special study. 

Elementary Mathematics Syllabus

CDS Syllabus for Mathematics
ArithmeticsNumber System—Natural numbers, Integers, Rational and Real numbers.
Fundamental operations, addition, subtraction, 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. 
AlgebraBasic Operations, simple factors, Remainder Theorem, H.C.F., L.C.M., Theory of
polynomials, solutions of quadratic equations, the 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.
TrigonometrySine ×, 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. 
GeometryLines and angles, Plane and plane figures, Theorems on (i) Properties of angles at
a point, (ii) Parallel lines, (iii) Sides and angles of a triangle, (iv) Congruency of
triangles, (v) Similar triangles, (vi) Concurrence of medians and altitudes, (vii)
Properties of angles, sides and diagonals of a parallelogram, rectangle and square,
(viii) Circles and its properties including tangents and normals, (ix) Loci. 
MensurationAreas 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. 
StatisticCollection and tabulation of statistical data, Graphical representation frequency
polygons, histograms, bar charts, pie charts etc. Measures of central tendency. 

Intelligence and Personality Test

The SSB procedure consists of a 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:-

  1. Stage I comprises of Officer Intelligence Rating (OIR) tests are Picture Perception* Description Test (PP&DT). The candidates will be shortlisted based on the combination of performance in OIR Test and PP&DT.
  2. Stage II comprises of Interview, Group Testing Officer Tasks, Psychology Tests and the Conference. These tests are conducted over 4 days.

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 marks are allotted by assessors only after taking into consideration the performance of the candidate holistically in all the test.
  • Also, marks for Conference are also allotted based on the initial performance of the Candidate in the three techniques 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. 

CDS 1 2021 Sample Paper

Candidates can check the CDS Sample Paper mentioned below:

Candidates can also check: CDS 1 2021 Exam Pattern

Subscribe to Get Updated Information

+91 -


Form Start Date:

28 Oct 2020

Form End Date:

17 Nov 2020

The last date to submit the form was on 17 Nov 2020
Browse Other Exams
Examination Date (Online):

07 Feb 2021

Application Fees:

₹ 200

Admissions open for


01 Apr 2021-30 Jun 2021


21 Jun 2021-21 Jun 2021

VIT AP Admission

30 Nov 2020-30 Jun 2021

DIT University Admission 2021

01 Nov 2020-22 Mar 2021


20 Jan 2021-08 Jul 2021