Let me know you that NDA exam is held both in Hindi and English ,you can go according to your comfortable language
I wish good luck!
No need to worry as NDA Exam is available in both Hindi and English language. You can answer the questions in Hindi language. It is an offline exam of 2 hours and 30 minutes. It is conducted 2 times an year means you can give two attempts.
For more information about the same, please go through the link given below :