Online NDA Coaching Online NDA Coaching: National Defence Academy is the Only Tri Services Academy in the Country which makes Commissioned Officers  for  Army,Air Force and Navy together.To get into NDA one needs to Cross 3 Steps:- Step 1-Clear the Written Examination Step 2-Clear SSB Interviews (5 Day SSB Procedure) Step 3-Clear Medicals  NDA Written Examination NDA Written Examination is conducted  twice a Year in month of April and September.The Examination is Conducted by UPSC and is a bilingual Paper.Examination is divided into 2 Papers:- Paper 1-Maths-120 Questions-Objective Type Paper 2-GAT-150 Questions Comprising of Eng,Gk and Science-Objective Type Every 6 Months,