Hi aspirant,

NDA Exam is a national level exam conducted twice a year by the Union Public Service Commission (UPSC) to offer admissions and select candidates for Army, Navy and Air Force wings of National Defence Academy and Indian Naval Academy Course.

The examination consists of two papers that is Mathematics and general ability test. both papers are conducted for 2.5 hours each with the total marks being 300 and 600 respectively. You can see the complete overview of the same in table below:

NDA Overview

For more details, you can visit NDA 2021 exam - Application (Released), Admit Card, Syllabus Pattern (careers360.com)

Hope it helps!!