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Combined Defence Services Examination (CDSE)

The Combined Defence Services written Examination  (abbreviated as CDS Exam) is conducted twice a year by the Union Public Service Commission for recruitment into the Indian Military academy, Officers Training Academy, Indian Naval Academy and Indian Air Force Academy. Getting success in CDSE, you get such a rewarding platform wherein you can prove your skills of effective intelligence, creativity, leadership, interpersonal, social adaptability and decision making. CDS (I & II) Written Exam marks the career of aspiring candidates in Indian Army, Air Force and Navy to greater and broader extent.


is a two-tier examination, wherein it includes:


Written examination and


SSB Interview. Glance view at CDS Recruitment Drive:

CDS Written Exam Details

Exam Name

Combined Defence Services

Conducting Body

Union Public Service Commission

Official Website

Exam Type

National Level

Mode of Application


Exam Mode


Selection Process

Phase I- Written Test (Objective Type)

Phase II- SSB Interview

Phase III- Medical Test

Phase IV- Merit List

Tentative Vacancies Per Course

400 (twice a year) for IMA/INA/AFA/OTA or as notified from time to time

CDS (I & II) Exam Notification (in Employment News/ leading daily news Paper/ UPSC website)

October and August

NDA(I & II) Exam Conducted

February and November

Likely SSB Date

May/Jul for IMA/INA/AFA; Aug/Nov for OTA and Dec/Jan for  IMA/INA/AFA; March for OTA

Training Academy

Indian Military Academy, Dehradun; Indian Naval Academy, Ezhimala; Air Force Academy, Hyderabad and Officers’ Training Academy, Chennai

Duration of Training

18 months for IMA Cadets

37-40 months for Navy Officers

74 months for Air Force Officers

CDS Written Exam Eligibility Criteria:


Male and Female both

Marital Status


Age Limit

19 to 25 year’s (as on the first day of the month in which is due to commence)

Educational Qualification-IMA,OTA

Degree of a recognised University or equivalent or final year appearing (in any stream)

Educational Qualification-INA

Degree in Engineering from a recognised University/Institution or final year appearing

Educational Qualification-AFA

Degree of a recognised University (with Physics and Mathematics at 10+2 level) or Bachelor of Engineering or final year appearing