Dear Aspirant

There are some tips for nda

• Set your goal
• Clear your basic concepts from the high school books
• Improve the English section by reading newspapers daily and brush up grammar skills
• Solve previous years' question papers to know the types of questions asked in the exam
• Attempt mock test to improve your speed and accuracy

NDA exam consist mainly 3 subjects

Maths- statiscs and probability,vector analysis,differential equations etc

English -candidates can go through grammar and usage, vocabulary, comprehension and cohesion.

General ability test -Candidates should stay updated with current affairs of last six months. Candidates can study p rominent personalities of both Indian and International level, cultural activities and sports activities and some parts containing history,physics,chemistry and biology

For more details visit link - https://www.google.com/amp/s/competition.careers360.com/articles/nda-syllabus/amp

Hope it helps

Thank you