CDS Eligibility:
CDS is conducted in two stages for the post of office cadre in Indian Army or Indian Navy or Indian Air Force or Officer’s Training Academy (OTA). The post preference must be mentioned at time of registration.

UPSC has released CDS I registration and exam dates:
Registration: October 31 – November 26, 2018
CDS I Date:February 3, 2019 in offline mode – Check CDS Exam Pattern

Listed below are few key points of who all can are eligible to apply online:
Indian/ outside India candidates from neighboring countries who are settled in India.
The upper age limit varies for the different institutes and categories but the minimum age limit is 19 years.
Female candidates are eligible for OTA only.
Married candidates can apply only for Air Force Academy (AFA) and OTA.
For IMA/INA/AFA, B.Tech degree is acceptable while degree in any discipline is accepted in OTA.Check OTA Exam Pattern, Syllabus and Books
Candidates must be physically fit for any post as per the physical standards set by the institute.

Approximately, 417 posts will be filled through this exam:
100 for the Indian Military Academy, Dehradun
45 for Indian Naval Academy, Ezhimala
32 posts for Air Force Academy, Hyderabad
225 posts for Officers’ Training Academy, Chennai.
15 posts for Officers Training Academy, Chennai-25th SSC Women (NT) course
Candidates must be physically fit for any post as per the physical standards set by the institute.

Note: The last date to download CDS I Admit Card is February 02, 2019.