CDS Online Coaching

Join online video course for CDS preparation. Enrol for CDS OTA online classes now!

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CDS online coaching by BYJU's Exam Prep is a preparation approach that has been launched to help you prepare for OTA and other CDS 2021 exams. Switch your mode of learning to e-learning with the CDS 2 online video course of BYJU'S Exam Prep and learn from the top faculties of India. In our course, you will find structured coursework for the exam. Strengthen your concepts and get clarification of your doubts from the faculty.

Online Classroom Program of CDS coaching enables your exam preparation by providing unlimited access to all live classes and mock tests. The CDS Online Classroom Program subscription provides a wide opportunity to prepare for CDS and other defence examinations with Expert Faculty. It also provides regular practice, revision, and performance reports.

CDS 2 Online Course: Key Highlights

An All-inclusive Online Coaching Classes

In the 120-days Online Coaching Classes by BYJU'S Exam Prep, you will find 220+ hours of live classes, which will be more than enough to clear CDS II 2021 and qualify for SSB. In addition to that, the course also includes 220+ PDFs, 14+ weekly tests, 300+ mock tests, and 5500+ practice questions. 

Weekly Assessments & Mock Tests

Preparing for CDS OTA & other exams is a continuous process during which you will have to assess your performance regularly, and work upon your mistakes. Hence, in addition to the comprehensive study material, the CDS video lectures course also includes weekly assessments and mock tests, which you can attempt to enhance your speed and accuracy while solving the questions. 

Unlimited Practice

With interactive quizzes and practice sessions, you can retake the quizzes and watch the recorded sessions as many times as you need to. They can also download the videos from BYJU'S Exam Prep and watch them later, offline.

Expert Faculty from Premier Institutes of Delhi

The content of the live course has been prepared by the Expert faculty from premier institutes of Delhi, who have years of experience in their field and have helped numerous aspirants in achieving their goals.

CDS Online Classroom Program Subscription

Online Classroom Program for CDS courses includes comprehensive study material which will be taught by Expert Faculty, regular mock tests and quizzes. The CDS Online Classroom Program Subscription provides comprehensive study material, structured revision notes along performance data and report cards. 

CDS 2 2021 Exam

Union Public Service Commission (UPSC) conducts the Combined Defence Services (CDS) examination two times a year for recruiting candidates in the Indian Military Academy, Indian Naval Academy, Officers Training Academy, and Indian Air Force Academy.

Candidates applying for the exam must be in between 20 to 24 years of age. Those who have passed graduation or in the final year of graduation are eligible to apply for the CDS OTA exam, provided they are able to submit the certification of passing at the time of commencement of the course.

To ensure selection in CDS in the first attempt, you can join the online classes where you will gain an insight into the exam pattern and get a complete study package.

Our Expert Faculty

Faculty Image

Faculty Name



Sharad Mudgal

General Awareness Expert

(a) 5+ Years of Experience in Teaching General Awareness
(b) Mentored 1 Lakh+ Students

Akash Randev

General Awareness Expert

(a) 5+ Years of Experience in Teaching General Awareness
(b) Mentored 1 Lakh+ Students


Navin Iyer

English Expert

(a) 9+ Years of Experience in Teaching English for Competitive Exams
(b) Mentored 75000+ students


Science Expert

(a) 3+ Years of Experience in Teaching Science for Competitive Exams
(b) Mentored 25000+ students

Sweta Singh

Science Expert

(a)6+ yrs of experience in teaching Science for competitive exams
(b) Mentored 30,000+ students

Ankush Gaba

General Studies Expert

(a) 3+ Years of Experience in Teaching General Studies
(b) Mentored 12000+ Students

Subodh Patwari

English Expert

(a) 16+ Years of Experience in Teaching English
(b) Mentored 50,000+ students

Benefits of taking CDS Online Course

Efficient & active learning

  • Online classes for CDS are attractive in nature to the attention and elevates the interest of the candidates. 
  • Visual learning and observing ensures the long term retention of concepts in the memory
  • The syllabus is deeply understood with complete clarity. 

Constructive Time-Mangement

  • Time is strategically divided to complete the course.
  •  Explanation, as well as a recapitulation of the syllabus, is done well in time
  • Smart study techniques followed by an extensive revision in a well-stipulated amount of time
  • Efforts and time spent on every topic uniformly

Retention of Concepts

  • The teaching process aims at mind-mapping of concepts
  • Concepts are clearly explained with minute details. 
  • Experienced faculties lay down the most effective strategies to understand the concepts.
  • Easy and relatable language so that candidates can understand without any hindrance.

CDS Exam Pattern 2021

CDS Exam Pattern for IMA, INA, AFA



Maximum marks


2 hours


General Knowledge

2 hours


Elementary Mathematics

2 hours


CDS Exam Pattern for OTA



Maximum marks


2 hours


General Knowledge

2 hours


CDS Syllabus 2021

English Syllabus 

The aim of this section is to test the understanding of English as well as word usage by the candidates. Questions in this section will be asked from the following topics:

  • Fill in the blanks
  • Reading Comprehension
  • Vocabulary (Synonyms/ Antonyms/ Phrases)
  • Sentence Rearrangement (Jumbled sentences)
  • Spotting Error
  • Sentence Improvement/ Correction

General Knowledge 

This section aims to check how well the candidates keep up with the current events and how well they understand their surroundings, especially in reference to their scientific aspects.



Current Affairs

Cover news of important international and national summits/ conferences, awards, sports-related news, books, and authors, etc.

Political Science

Important facts of the Indian constitution, fundamental rights, and directive principles, powers of the president and prime minister, constitutional bodies, Indian judiciary, etc.

Indian History

Questions may be asked from Ancient, Medieval and Modern India.

Indian Polity

Prepare important facts of Indian as well as world geography.


Prepare topics like Budget, Five-year plan, foreign trade, etc.

General Science

  • In Physics, focus on topics like optics, motion, force, units, heat, electricity, temperature, etc.
  • In Chemistry, prepare important topics of organic, inorganic, physical, and general chemistry.
  • In Biology, focus on the topics of important diseases, botany, zoology as well as human biology.

Defence Related News

Questions in this section may be asked from important defence related topics like Army Day, Navy Day, recent developments, etc.

Elementary Mathematics 




  • Number System (natural, integers, rational & real numbers)
  • Fundamental operations (subtraction, addition, division, multiplication)
  • Unitary method
  • Percentages
  • Time & Work
  • Simple & Compound Interest
  • Time & distance
  • Ratio & proportion
  • Profit & loss
  • Elementary number theory
  • Composite & prime numbers
  • Divisibility tests
  • Theorem of factorisation
  • Factors & Multiples
  • Euclidean algorithm
  • laws of algorithm & algorithmic tables


  • Basic operations
  • Remainder theorem
  • L.C.M. & H.C.F.
  • Polynomial theories
  • Quadratic equations (relation between roots & its coefficients)
  • Linear equations in 2 variables
  • Set language and set notation
  • Laws of indices
  • Conditional identities
  • Rational Expressions


  • All about Sine a, Cos a, Tan a when 0° < a < 90°, Sin, Cos and Tan values of important angles like 0°, 30°, 45°, 60° and 90°
  • Simple trigonometric identities
  • Trigonometric tables
  • Heights and distance


  • Plane & plane figures
  • Lines, and angles
  • Important theorems (like angle property based)
  • Parallel lines
  • Congruency of triangles
  • Medians & Altitudes
  • Similar triangles
  • Parallelogram
  • Circles
  • Rectangle
  • Square


  • Areas of circles
  • Triangles
  • Rectangles
  • Squares
  • Parallelograms
  • Volume
  • Surface area of cuboids
  • Cones
  • Cylinders
  • Spheres


  • Tabulation of statistical data
  • Graphical representation of frequency polygons
  • Bar graphs
  • Histograms
  • Pie charts
  • Measures of central tendency

CDS 2021 Exam Highlights



Name of exam

Combined Defence Services Examination

Conducted by

Union Public Service Commission (UPSC) 

Exam level


Exam frequency

Twice a year

Exam mode


Exam mode

Two hours

Language of question paper

English and Hindi

Application Fee

INR 200/-

Exam Purpose

To select candidates as Commissioned Officers in Indian Army, Navy and Air Force


CDS I: 345

CDS II: 344

No of the test cities


Official Website

Why choose CDS online course?

  • Completly follows the CDS Exam pattern
  • Comprehensively and in-depth discussion of the CDS Syllabus
  • Facilitates complete real-time exam experience
  • Detail solutions to the questions to help improve your performance
  • The overall analysis of the performance through a detailed and elaborated analysis report
  • Get knowledge about the preparation gaps and work upon them.

How to enrol for CDS 2 Online Coaching?

  • Visit the official website of BYJU'S Exam Prep.
  • Now, select the 'Course' option.
  • From the drop-down menu, choose Defence Exams.
  • Click on the tab of CDS and go through the course highlights.
  • You can opt for a free trial of the video course.
  • If you are satisfied with the course quality, click on ‘Buy Now’ to purchase the online course.
  • After doing the payment, you can view the full content of the 'Mission CDS 2021: A Score Booster Course'.

Note: The expiry date of the BYJU'S Exam Prep video course is 31st December 2021.

Requirements for accessing CDS 2 Online Classes?

  • A Dual-Core processor and 2 GB RAM Laptop or Desktop.
  • If you have an active internet connection, preferably with 2 MBPS download speed, you can access the online classes without any video/audio interruption.
  • Use headphones, if required.
CDS Online Coaching FAQs
  • Is 'Gradeup' and 'BYJU’S Exam Prep' the same? If yes, what does BYJU'S Exam Prep Offer?

    Gradeup is now BYJU'S Exam Prep that offers the most comprehensive preparation for all exams. Get Monthly/Weekly Current Affairs, Daily GK Update, Online Courses, Latest Pattern Test Series and detailed Study Material from the top faculty at your fingertips. Want to learn more? Do not hesitate to contact our customer care here.

  • What is CDS Online Coaching? How can I enrol in the Video Courses?

    Online Coaching Classes for CDS is a modern and well-organised approach to study and prepare for the exam remotely. Unlike the traditional CDS coaching classes, you can rewind the class and get one-on-one experience with top faculties of India. With online coaching classes for CDS, you can clear your doubts, practice various questions, learn anytime-anywhere at your pace and save time. 

    To enrol for the CDS Online Coaching Classes by BYJU'S Exam Prep, follow the below steps:

    • Visit the official site of BYJU'S Exam Prep -
    • Now go to the ‘Courses’ section 
    • Choose the CDS & Defence category 
    • Now click on the exam
    • Take free trial classes before you purchase the BYJU'S Exam Prep’s Online Live Courses

  • What is CDS Online Classroom Program Subscription?

    CDS Online Classroom Program Subscription enables you to prepare for the CDS exam along with other Defence exams using one preparation resource. It is a subscription that gives you unlimited access to all live courses and mock tests.

  • What is the validity of CDS Online Classroom Program Subscription?

    The validity of CDS Online Classroom Program Subscription varies as per the candidate’s choice and need. BYJU'S Exam Prep offers several validity options ranging from 1 month, 3 months, 6 months, 12 months and 24 months.

  • Do I get a CDS mock test with CDS Online Classroom Program Subscription?

    Yes, you also get access to all CDS mock tests along with other Defence mock tests with Online Classroom Program Subscription. On top of that, you get a Test Series complimentary with every purchase of Online Classroom Program subscription.

  • Is there any validity for using the purchased CDS Online Coaching Classes?

    Yes, there is a set validity for Online Classroom Program Subscription. Make sure you read the validity and other related details carefully before you make the payment for Online Classroom Program Subscription. CDS online classes will be available until the expiry of Online Classroom Program Subscription.

  • Do I have to pay to take ‘Free-Trial’ for CDS Online Courses?

    To take the trial of CDS online coaching class, you don’t need to pay anything. You can take the trial for free. 

  • Can I rewind the CDS online coaching class again, in case I missed any of the class?

    Yes, after the Live Class for CDS is over, we upload the entire class online so that those who missed the online class can watch later the entire session from the beginning.

  • How to use the ‘Doubt’ feature of CDS Online Classes? How will my questions be answered?

    During the Live Coaching Classes of CDS, you can ask your doubts directly to the faculty teaching at that time. Make sure you drop your doubts in the ‘Doubts’ section. You can even attach the relevant graphic media (screenshot/photo) while posting your doubt.

  • I am having some technical trouble while using the Online Coaching Classes for CDS, where do I contact?

    If you encounter any technical trouble or buffering/broadcast issues you can email us at 

  • What will be the timing of the CDS Online Coaching Classes?

    The complete schedule of Online Coaching Class for CDS exam will be provided to you. You can prepare your schedule and attend the Live Classes as per the time-table. You can watch the pre-recorded classes in case you miss any.

  • Can I also download the Online Video Courses for CDS?

    The videos can be downloaded and watched offline in the BYJU'S Exam Prep app under "My Downloaded Videos" section. This feature is only accessible for the students who have purchased the Online Classroom Program Subscription. These videos will be available until the expiry of Online Classroom Program Subscription.

  • Will I get study material along with the Online Coaching Classes for CDS?

    You will be provided with the complete study material for CDS in the form of PDFs. You can take a printout of the PDFs provided during the video courses for revision purpose.

  • What are the technical requirements to use the CDS Video Courses?

    Make sure you fulfill the below-mentioned requirements: 

    • High-Speed Internet 
    • Laptop/Desktop with a dual-core processor and 2 GB RAM
    • Or a smartphone.

  • Can I make payment of the CDS Online Coaching Classes offline also?

    The payment for CDS online coaching class will be made online only through Online Classroom Program Subscription. You can pay through net banking/cards/UPI.