To get in Defence field you need to score more than 70% or more marks in examination and if you going for officer Training Academy then Mathematics marks score in examination will not be counted in interview examination.
CDS Cut off marks
For Naval Academy and Air Force Academy the written test will be conducted into three sections and list of following subjects are Communication skills or say English, Elementary Mathematics and General knowledge. The paper of Combined Defence Service examination will be objective and carry 100 marks each and total paper marks will be 300 and Cutoff criteria is varies for various positions like Naval Academy, Officer Training Academy.
CDS cut off marks for SC/ST, OBC, GEN and OTA are declared by UPSC annually on their official website.
Though there is age relaxation fro SC/ST, OBC there is no difference and CDS cut off marks for SC/ST, OBC, GEN and OTA is the same.