Hi Aspirant!

As per the CDS IMA 2021 eligibility criteria, candidate must be born between  2nd January, 1997 and 1st January, 2002 . Means, you can write CDS IMA 2021. And the candidate's age must be between 19 to 24 years with unmarried status. Exam is conducted twice a year. And there is no fixed number to attempt the exam. You can attempt the exam as many times until you are 24. To know more visit here:

https://competition.careers360.com/articles/cds-eligibility-criteria

Thankyou!