The CDS exam is conducted for candidates who wish to pursue their career as commissioned officers in the Navy, Air Force, and Army after graduation or candidates appearing in their senior year. The CDS 2021 exam is held twice a year in February and November.

Eligibility for CDS:

• Nationality:

an Indian citizen, or

a Tibetan refugee (before January 1962), or

a subject to Nepal or Bhutan, or

Migrants from Pakistan, Burma, the United Republic of Tanzania, Zambia, Malawi, Zaire, and Ethiopia or Vietnam Sri Lanka and East African Countries of Kenya, Uganda, with the intention of permanently settling in India

• Age:

Candidates must be 20 to 24 years.

For educational qualifications and other details you can follow the link provided below:

https://competition.careers360.com/exams/cds

I hope this answer helps. All the very best for your future endeavors!