Dear student,

Yes you have to clear each subject and their will be sectional cut off to clear NDA. You should get atleast 25 percentage in each subject.

Marks distribution of NDA Exam.

Total Marks of the Written Exam - 900 (300 for Maths, 600 for GAT)

Total Marks of the SSB Interview Session - 900

Total Marks - 1800

For more information go through below link.

https://competition.careers360.com/articles/nda

Hope this information helped you.

All The Best!!