What Is the Selection Process for the NDA Exam? The selection process for the NDA (National Defence Academy) exam is conducted by the Union Public Service Commission (UPSC) and includes multiple stages to assess a candidate's academic ability, physical fitness, and personality. Here’s a detailed breakdown: 1. Written Examination (Conducted by UPSC) The first stage is a written exam consisting of two papers: Mathematics – 300 marks GAT (General Ability Test) – 600 marks (Includes English, General