my date of birth is 06 August 1995. am i eligible for CDS 1 2020 exam

Dear Rajni, considering your date of birth, you will be 24 years and few months old by January 2020. The eligibility criteria says that unmarried or widowed male/female candidates should not be younger than 19 years and should not be older than 25 years as of January 2020. And the permitted years are from July 1994 to July 1999. Your age falls within accepted years and so you are eligible for CDS 1 2020.