Dear aspirant hope you are doing well..

You can download the previous years question papers. Download link is given below.

https://competition.careers360.com/articles/nda-question-papers/amp

You can also get the exam pattern, previous years cut off , NDA syllabus using the link given below.

https://competition.careers360.com/articles/nda-question-papers/amp

Preparation tips for NDA, read the given article.

https://competition.careers360.com/articles/nda-question-papers/amp

Books for NDA

• Chapter wise-Section wise Solved Papers NDA & NA Arihant
• Study Package for NDA/NA Entrance Exam Tata McGraw-Hill Education India
• Pathfinder for NDA & NA National Defence Academy Naval Academy Entrance Examination  Arihant
• Study Package for NDA/NA Entrance Exam
• Tata McGraw-Hill Education India

Hope it's helpful thank you