Hello student as per the eligibility criteria Candidates in their final year are also eligible to appear in UPSC CDS examination so yes you can appear in CDS Nov 2021.

CDS recruitment is done for various courses in the three Indian Defence Services - Army, Air Force and Navy, which have different minimum educational qualification requirements. I request you to please help me with your preferable course so that I can check and provide you with the exact eligibility requirements.

For more details refer to the link mentioned below - https://www.google.com/amp/s/competition.careers360.com/articles/cds-eligibility-criteria/amp