To determine your eligibility for the CDS (Combined Defence Services) exam in 2027, we need to consider the age criteria set by the Union Public Service Commission (UPSC), which conducts the exam.

For the CDS exam, the age criteria generally are as follows:

1. Indian Military Academy (IMA) : Candidates should be between 19 to 24 years old.
2. Indian Naval Academy (INA) : Candidates should be between 19 to 24 years old.
3. Air Force Academy (AFA) : Candidates should be between 19 to 24 years old.
4. Officers’ Training Academy (OTA) : Candidates should be between 19 to 25 years old.

Your date of birth is 29th November 2003. By March 2027, you will be 23 years and 4 months old. This means you fall within the eligible age range for all branches (IMA, INA, AFA, and OTA) for the CDS exam.

Given that you will complete your course in March 2027, you should be eligible to apply for the CDS exam in 2027, provided you meet other criteria such as nationality, marital status, and educational qualifications. Make sure to check the official CDS notification for any updates or changes in the eligibility criteria closer to the exam date.