The NDA Examination is divided into two parts Mathematics[300 Marks] and General Ability Test (GAT) [600 Marks].
Total Marks = 900
The syllabus for both the papers are as follows-

1. Mathematics 120 Questions
1. Algebra
2. Matrices and Determinants
3. Trigonometry
4. Analytical Geometry of two and three dimensions
5. Differential Calculus
6. Integral Calculus and Differential Equations
7. Vector Algebra
8. Statistics
9. Probability
2. GAT
1. English [200 Marks] 50 Questions
2. Part B [400 Marks] 100 Questions
1. Physics[100]
2. Chemistry[60]
3. General Science[40]
4. Indian History & Freedom Movement in India[80]
5. Civics
6. Geography[80]
7. Current Events[40]

I hope the given data helps.
All The Very Best!