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CDS & Defence Exams

CDS Mock Test 2021, Practice Online Test Series (2)

131 Tests

Attempt Free CDS Mock Test at BYJU'S Exam Prep to analyze and improve the performance! Practice online with CDS Test Series 2021 to score better in the CDS 2 exam.

  • 60 Mock Tests, 20 Sectional Tests, 24 Prev. Year Papers
  • Based on Latest Exam Pattern
  • Detailed Solution in English
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CDS (I) 2022: Mathematics

6 Mock Tests
No tests

CDS (I) 2022: English

6 Mock Tests
No tests

CDS (I) 2022: General Knowledge

6 Mock Tests
No tests


8 Mock Tests
No tests


30 Mock Tests
No tests

CDS (II) 2021: English

10 Mock Tests
No tests

CDS (II) 2021: General Knowledge

10 Mock Tests
No tests

CDS (II) 2021: Mathematics

10 Mock Tests
No tests

CDS (II) 2021: Sectional Test

12 Mock Tests
No tests

CDS (II) 2021 Previous Year Mock Test

33 Mock Tests
No tests
My Performance
Your performance analysis will appear hereYour strengths and weaknesses will be shown here after you attempt atleast 3 mock tests

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Student Ratings & Reviews

4.528399 reviews
View All
Akash Dudhal
Akash DudhalA definite value addition to my CDS Preparation
The mock test helped me learn the best way to solve the question paper by avoiding frequent mistakes and improve my score.
Aishwarya Pawar
Aishwarya PawarIncredible Explanation
Thank you for providing these mock tests where we can actually have a real kind of practice and judge our preparation level for the exam.
rakesh pandey
rakesh pandeyOverall Good
Thank you for the practice set, these test series are very helpful in providing the right assistance to the students.
Akash Dudhal
Akash DudhalA definite value addition to my CDS Preparation
The mock test helped me learn the best way to solve the question paper by avoiding frequent mistakes and improve my score.
Aishwarya Pawar
Aishwarya PawarIncredible Explanation
Thank you for providing these mock tests where we can actually have a real kind of practice and judge our preparation level for the exam.
rakesh pandey
rakesh pandeyOverall Good
Thank you for the practice set, these test series are very helpful in providing the right assistance to the students.

Attempt CDS Mock Test 2021 Free with BYJU'S Exam Prep's CDS online test series for CDS 2021 English, GK & Maths papers. CDS mock test series has been designed by a team of experts keeping in consideration the latest exam pattern and the same difficulty level.

The CDS Test Series for CDS 2 2021 exam will surely help you to prepare thoroughly and will aid you in knowing how well you will fare on the actual exam day amongst the lakhs of aspirants.

CDS Mock Test 2021 | CDS 2 Exam Overview

Combined Defence Services (CDS) is an organized exam conducted yearly by UPSC for various posts under Indian Air Force Academy, Officer Training Academy, India Military Academy & Indian Naval Academy. The selection for the above-mentioned posts is done on the basis of written exam and Interview followed by the medical examination & document verification.

To tackle the difficulty level of the exam, you need to take the CDS 2 Mock Test 2021. Candidates those who aspire to obtain a career in the Indian army should practice these CDS test series online to get a perfect score and derive maximum marks to crack the cut off with ease. Also, candidates can practice these CDS Test Series daily to tackle the difficulty level and prepare effectively to score better in the CDS 2 2021 examination.

CDS Test Series 2021 (2) Schedule

Sectional MockDateNo. of Questions
English - I19-May-202150
Maths - I28-Jul-202150
English - II29-Sep-202150
Maths - II27-Oct-202150

DateMock Name
7-Apr-2021CDS Mock - 1
 5-May-2021CDS Mock - 2
 2-Jun-2021CDS Mock - 3
 7-Jul-2021CDS Mock - 4
 4-Aug-2021CDS Mock - 5
 8-Sep-2021CDS Mock - 6
 22-Sep-2021CDS Mock - 7
 6-Oct-2021CDS Mock - 8
 20-Oct-2021CDS Mock - 9
 10-Nov-2021CDS Mock - 10

Previous Year PaperDate
CDS 2016 (I) 31-Mar-2021
 CDS 2016 (II) 14-Apr-2021
 CDS 2017 (I) 28-Apr-2021
 CDS 2017 (II) 12-May-2021
 CDS 2018 (I) 26-May-2021
 CDS 2018 (II) 9-Jun-2021
 CDS 2019 (I) 23-Jun-2021
 CDS 2019 (II) 30-Jun-2021
 CDS 2020 (I) 21-Jul-2021
 CDS 2020 (II) 18-Aug-2021
CDS 2021 (I) 1-Sep-2021

CDS 2 Mock Test Series 2021 Key Features

  • A set of 30 full-length mock test.
  • CDS Mock Solutions to every question is available only in the English language.
  • Subject-wise (English, Maths & GK) Mock test available.
  • Furthermore, you can attempt these CDS mock test series on Mobile as well as on PCs.

Buy CDS Test Series 2021

Buy the CDS mock test to analyze, improve, prepare, and test your exam preparation for the best performance. CDS exam requires in-depth knowledge and conceptual clarity; therefore, regular solving of the CDS mock test is essential. CDS test series covers the entire syllabus in a structural and time planned manner.

Purchase CDS test series to upgrade the level of preparedness and gain insight into the gaps in your preparation to make necessary improvements. Practice and improve regularly to ace the exam and beat the competition.

How to take the CDS Mock Test 2021?

Candidates need to follow the steps given below:

  • Open the official website of BYJU'S Exam Prep
  • Click on the Test series tab
  • Select the CDS & Defence section
  • Select the CDS Exam
  • The CDS Mock Test series will appear
  • Make the one-time payment and have access to the mock test series

Benefits of taking CDS Mock Test Series 2021

Purposeful Time-Management

CDS Mock test series helps in promoting time management in the most adequate manner. CDS mock test series provides practice of a wide variety of questions that can be accessed easily on a single platform that ensures the best performance. With effective time management, you can maximize your result in the stipulated amount of time.

Increase your Score

The overall score will see a major boost by taking the CDS Mock Test series. The test series for CDS will give you sufficient practice of a variety of questions in time-bound circumstances. The questions will give you adequate experience with diverse types of questions so that you can easily increase your score without making mistakes.

Retention of Concepts

The CDS Mock Test series is a great resource of the most relevant and reliable study materials. The study resources in the CDS Test series explain the topics in the syllabus covering all the details providing the utmost clarification on the complex topics so that you can easily comprehend and understand the entire syllabus.

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

Exam Fees

Rs 200

Exam purpose

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

CDS vacancies 

  • CDS 1: 345
  • CDS 2: 339

No of the test cities


Official website

CDS Syllabus 2021

English Syllabus for CDS Exam

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 Syllabus for CDS Exam

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 Syllabus for CDS Exam

Questions in the mathematics section will be asked from Arithmetic, Algebra, Trigonometry, Geometry, Mensuration, and Statistics. Here are the details of the topics which will be covered under these sub-sections:




  • 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 Pattern


Officer Training Academy (OTA)









2 hours



2 hours

General Knowledge

General Knowledge

Elementary Mathematics


CDS 1 2021 Exam: Important Dates


Important Dates

CDS 1 2021 Notification Date

28th October 2020

CDS 1 online application starts from

20th October 2020

Last date to apply for CDS 1 exam

17th November 2020

CDS 1 2021 Exam Date

07th February 2021

CDS 2 2021 Exam: Important Dates


Important Dates

CDS 2 2021 Notification Date

04th August 2021

CDS 2 online application starts from

04th August 2021

Last date to apply for CDS 2 exam

24th August 2021

CDS 2 2021 Exam Date

14th November 2021

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CDS Mock Test 2021, Practice Online Test Series (2) 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.

  • How can I unlock the CDS Test Series from BYJU'S Exam Prep?

    If you want to unlock CDS Test Series, follow the given steps:

    • Visit the official website/App of BYJU'S Exam Prep
    • Select ‘CDS & Defence Exam’
    • In the exam page, you will get the tab of ‘Unlock All Mock Tests’
    • On clicking the tab, you will be redirected to a new page of the Test Series
    • After you pay the fees, you will be able to unlock CDS Test Series
  • I have not received the access to the CDS Test Series that I have purchased?

    You can send an email to with the details of transaction. Our team will get in touch with you. Please send the email from the id which you used while transacting.

  • Can I pay through offline mode also?

    No, the only mode of payment we accept is online.

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    In case you want to cancel the Test Series and claim for the money back, then we would suggest you send the refund request at The refund will be done on your original payment mode and will be processed on a prorated basis. As per our refund policy, you can claim a refund within 7 days of purchase. Refund can be processed only in case of service not being provided by gradeup, for a maximum of transaction amount proportioned to the unused percentage of product.

  • Can I take the CDS test offline also?

    There is no option available to take the CDS Mock Test in offline mode.

  • Can I pause the test, save it and resume the test later?

    Yes, you can keep the test on pause, and resume it later whenever convenient.

  • Is CDS Test Series by BYJU'S Exam Prep available in Hindi?

    If the exam is Bilingual, you will get the Test Series in both English and Hindi. Thus, the language of the Test Series depends on the exam.

  • Can I reattempt the CDS Test Series?

    No, the re-attempt test option is not available.

  • Can I take the CDS test through my mobile phone also?

    Yes, you can take the test through both BYJU'S Exam Prep App and BYJU'S Exam Prep Website.

  • I am unable to see the Test Series for CDS exam which I have purchased. What should I do now?

    Make sure that you landed on the right page. Visit the main page of Online Test Series.

    In case you are still not able to find the exam, please write to

  • Does BYJU'S Exam Prep provide All India Rank (AIR) after the CDS Test Series result is declared?

    Yes, BYJU'S Exam Prep provides the All India Rank (AIR) after you submit the test.

  • I have lost the internet connection during the Mock Test, what will happen now? Can I resume the test once the connection is back?

    Yes, you can continue the test once the internet connection is back, you don’t need to start the test from the beginning.

  • Does BYJU'S Exam Prep provide solutions to the CDS Test Series after every test?

    Yes, you can check the complete explanation to every question available in the test once you submit the test.

  • Can I download my CDS Test Series in PDF format?

    Kindly note that we’re not providing copy option of our content, questions and solutions in PDF or to download.

  • Are all CDS Mock Tests active right at the start?

    Mock Tests are added as per the scheduled plan. Even before the purchase of the CDS Test Series, you can see the release date of each Mock Test. Usually one new exam is added in every 2-3 days.

  • How can I check the validity of the purchased CDS Test Series? Can it be changed on request?

    Please note that you can check the validity of the purchased CDS Test Series on the purchased email sent to you. Also note that the expiry date of the Test Series is fixed, and it can’t be changed on request.

  • From where I can attempt weekly Live Test. When the result will be out?

    Please note that you can attempt the weekly Live Test from the link shared over the notification mail. Once the analysis of the result is completed by our team, the result will be shared with you over the mail. Also, note that the result link shared over the email will remain active for 2-3 days.

  • I had access to the CDS Test Series, but it is showing ‘Buy Now’. What can I do?

    Please note that this may happen due to the following reasons:

    • This must be cache problem in your device, in this case we suggest you to clear the cache of your device
    • You might have logged in and paid from a different email id.

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