ASTRAL INSTITUTE FOR DEFENCE EDUCATION offers the best CDS classes in India. With the high number of selections in the DEFENCE EDUCATION, Astral is consistently giving the top results and high pass percentages.  

CDS is not a difficult course, but you will need good coaching to understand the concepts better and get valuable guidance. And ASTRAL INSTITUTE FOR DEFENCE EDUCATION is one such CDS Institute that understands the needs of the exam and the students.  

Our DEFENCE EDUCATION classes have limited seats so that teachers can give proper attention to each student. According to the student’s performance, we provide them personalized guidance so that they can get the best DEFENCE EDUCATION result. 

Join CDS Coaching in Gurgaon – ASTRAL INSTITUTE FOR DEFENSE EDUCATION is an institute that has become a favorite learning hub for CDS coaching in Gurgaon. ASTRAL INSTITUTE FOR DEFENSE EDU is extending the best CDS coaching with outstanding outcomes for the years together. The entrance exam is only for those aspirants who want to serve the Indian Army, Navy, and Airforce selflessly. ASTRAL INSTITUTE FOR DEFENSE EDUCATION has all the attributes to cater to the basic needs of the aspirants of the CDS exam. 

We Offer Coaching for CDS Exams 

Apart from the CDS coaching ASTRAL INSTITUTE FOR DEFENSE EDUCATION also provide coaching courses for various defense exams such as NDA and AFCAT. If you have already shortlisted ASTRAL INSTITUTE FOR DEFENSE EDUCATION then the proper information about the various defense exam course structure can help you pick this prominent platform without any hassle. Consider holding the hand of the ASTRAL INSTITUTE FOR DEFENSE EDUCATION so that you can easily achieve the impossibilities of your life. 

We Offer Coaching for These CDS Exams 
S. No. Courses Duration 
1. CDS (I) 2 to 3 months 
2. CDS (II) 1 to 2 months  

Upcoming Batches for CDS Coaching 

Exceptional Offer on the special batches for CDS coaching at a very rational fee. New batches will be starting this week. Candidates can visit the branch and take demo classes to secure their seats with our highly educated and experienced faculty members to get an exam target-based study module. The study material provided to the students during the CDS coaching is crafted under the supervision and guidance of highly experienced faculty members and subject experts. It is not very easy to clear the CDS examination by self-study. Professional guidance and training are necessary to enlighten the way to success. 


ASTRAL INSTITUTE FOR DEFENSE EDUCATION is not only known for providing best CDS Coaching. It is “the best” not only in terms of Infrastructure as well. 

Faculty Members for CDS Coaching 

ASTRAL INSTITUTE FOR DEFENSE EDUCATION is known for having 10+ years of experienced CDS trainers for coaching. Crack the exam on the first try. 


CDS Examination syllabus comprises of three papers – General Knowledge, English, and Mathematics. Mathematics is not asked in the OTA Category. To clear any government examination, one should have complete knowledge about the Syllabus. 

CDS Syllabus 

UPSC (Union Public Service Commission) has released the Combined Defense Service (CDS) Notification for the recruitment of total 339 vacancies. The Combined Defense Services exam is going to be conducted on various examination centers all over India by UPSC. Students can choose their category according to their interest and eligibility i.e., IMA (Institute of Management Accountants), INA, AFA, and OTA. The details of these are discussed here. 

Click Here for CDS Official Notification 

CDS Examination syllabus comprises of three papers – General Knowledge, English, and Mathematics. Mathematics is not asked in the OTA Category. To clear any government examination, one should have complete knowledge about the Syllabus. Here, we are providing the CDS Exam Syllabus for candidates to help in their preparation. 

CDS Exam: Overview 

Candidates who want to enter Defense forces through CDS must be looking for its exam pattern, topics-wise marking schemes, the number of questions and other related useful information. Though the syllabus has not changed much, still a few changes are there which you may face while appearing for the exam. One needs to be well versed with the pattern and syllabus of the CDS exam. In this article, we have provided you with the information related to CDS Exam Pattern and Detailed Syllabus. 

Name of the Exam Combined Defense Forces (CDS) 
Conducting Body Union Public Service Commission (UPSC) 
Exam Conducted in A Year Twice a Year 
Mode of Examination Offline 
Type of Questions Multiple Choice Questions (MCQs) 
Medium Hindi or English 
Number of Questions IMA/INA/AFA – 300 OTA – 200 
Time Duration 2 hours for each paper 
Negative Marking Yes (1/3 deducted for every wrong answer) 

CDS Syllabus 

To score well in CDS – most reputed exam, aspirants must be well-versed with the CDS Syllabus. CDS exam is the direct opportunity for the Defense aspirants to enter Indian Armed Forces. Here is a detailed overview of the CDS Exam Syllabus: 

CDS English Syllabus 

Spotting Errors Questions 
Sentence Arrangement Questions 
Synonyms & Antonyms 
Selecting Words 
Ordering of Sentence 
Comprehension Questions 
Ordering of words in a sentence 
Fill in the blank questions 
Idioms and Phrases 

To prepare for this section, we have provided you the best Test series prepared by the professionals. You should solve the practice sets that are available. It will also help you to know where you stand in your preparation. Read Newspaper daily and note difficult words and find their meaning to improve your vocabulary. Go through the grammar part and learn all the basic rules. It will help you in detecting errors in sentencing and even in sentence completion. 

CDS Math’s Syllabus 

Number 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. Factorization Theorem. H.C.F. and L.C.M. Euclidean algorithm. Logarithms to base 10, laws of logarithms, use of logarithmic tables. 
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. 
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. 
Lines 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. 
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. 
Collection and tabulation of statistical data, Graphical representation frequency polygons, histograms, bar charts, pie charts etc. Measures of central tendency. 

CDS General Knowledge Syllabus 

General Knowledge including knowledge of current events and of such matters of everyday observation and experience in their scientific aspects 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 a nature which candidate should be able to answer without special study. 

Current Affairs 
Defense related Award 

Apart from self-preparation, you can also take an online course from Adda247 for the same. This helps in clearing doubts. Professional guidance will boost your josh for the exam preparation. Be true to yourself and give your best efforts for the exam as the competition is tough. 

CDS OTA Syllabus 

CDS OTA English Syllabus 

Sentence arrangement 
Spotting Error 
Selecting words 
Synonyms and Antonyms 
Ordering of Sentence 
Ordering of words 
Idioms and Phrases 
Fill up the blanks 

CDS OTA General Ability Test Syllabus 

Current Affairs 
Defense Related Awards 
Sports and culture 
Environmental Science 

CDS Exam Pattern 

The CDS Written examination will be conducted in offline mode only. Candidates will be given an OMR sheet in which they have to fill in their responses. All the papers will be objective-type, multiple choice questions. The written examination consists of the subjects below: 

A) For Admission to Indian Military Academy, Indian Naval Academy, and Air Force Academy: 

Subject Duration Maximum Marks 
English 2 Hours 100 
General Knowledge 2 Hours 100 
Mathematics 2 Hours 100 
SSB Test/Interview 5 Days 300 

B) For Admission to Officers’ Training Academy: 

Subject Duration Maximum Marks 
English 2 Hours 100 
General Knowledge 2 Hours 100 
SSB Test/Interview 5 Days 300 

CDS Exam Important Instructions 

  1. Write only in Black ballpoint pen, your Centre and subject followed by the CDS test booklet series (in brackets), subject code and the exam roll number at the appropriate space provided on the answer sheet at the top. 
  1. Encode your CDS booklet series (A, B, C, or D as the case may be), subject code and roll number in the circles provided for the purpose in the answer sheet. 
  1. In case the CDS booklet series is not printed on the test booklet or answer sheet is un-numbered then candidates should report immediately to the invigilator and get the test booklet/answer sheet replaced. 
  1. Candidates should note that any omission/mistakes/discrepancy in encoding/filling of details in the CDS OMR answer sheet, especially regarding the Roll Number and Test Booklet Series Code, will render the answer sheet liable for rejection. 
  1. Immediately after the commencement of the CDS please check that the test booklet supplied to you does not have any unprinted or torn or missing pages or items etc., if so, get it replaced by a complete test booklet of the same series and subject. 
  1. Do not print your name or anything other than the specific items of information asked for, on the CDS answer sheet/test booklet/sheet for rough work. 
  1. Do not fold, damage, or put any extraneous marking over the CDS Answer Sheet. Do not write anything on the reverse of the answer sheet.