Hi Nilesh,

The NDA exam date of first attempt is April 18, 2021 and NDA second attempt is September 5, 2021.

The NDA 2021 syllabus is as follows:-

For 1st paper(Mathematics):-

• Differential Calculus
• Statistics and Probability
• Vector Algebra
• Analytical Geometry Of Two And Three Dimensions
• Trigonometry
• Matrices And Determinants
• Algebra
• Integral Calculus And Differential Equations

For 2nd paper(General Ability Test):-

• English language
• History
• Geography
• Physics
• Chemistry
• General Science

Refer here for more info - NDA Syllabus 2021 - Check Section Wise (Maths & GAT) Syllabus & Exam Pattern (careers360.com)

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!