The UPSC NDA exam is one of the most competitive recruitment examinations which are conducted for admission to the Army, Navy or Air Force. Applicants who want to join the Indian defence sector need to join the National Defence Academy, situated near Pune, in Maharashtra. Candidates are chosen after the selection process. The Army, Navy and Air force train in their respective service academies. The entrance exam is conducted twice a year by the Union Public Service Commission (UPSC).Candidates who meet the eligibility criteria can apply for the UPSC NDA exam by logging onto the official website of UPSC which is www.upsconline.nic.in and then by completing the application process. After that the candidates need to fill up their application form, then they will be required to click on submit and take a printout for future identification. The Joint Services academy of the Indian Armed Forces is the National Defence Academy (NDA), where cadets from the 3 services comprising the Army, the Navy and the Air Force prepare alongside each other before going on to complete their pre-commissioning training in their relevant service academies.For joining NDA or the Naval Academy, the candidate needs to be a 10+2 pass out for the army. For air force and navy, the candidate should be a 10+2 pass out with Physics and Mathematics as subjects. Candidates those who are about to appear for their Class 12 examination can also compete. These candidates have to submit their their Class 12 pass certificate as a proof within the date that has been set in the Commissions Notice for the Examination.The candidate should be at least one of the following: (i) a citizen of India, or (ii) a subject of Bhutan, or (iii) a subject of Nepal, or (iv) a Tibetan refugee who came over to India before January 1, 1962 with the intention of settling down in India, or (v) a person of Indian origin who has migrated from Pakistan, Burma, Sri Lanka and East African Countries of Kenya, Uganda, the United Republic of Tanzania, Zambia, Malawi, Zaire and Ethiopia or Vietnam with the intention of permanently settling in India. The candidates have to undergo a medical examination by a Board of Service Medical Officers (This is after the written test and interview). The results of the Medical Board are private and the candidates who are declared unfit are being informed by the President of the Medical Board.The candidates need to be physically and mentally fit according to the prescribed conditions. The age limit of the candidates needs to be between 16.5 - 19 years as of the first day of the month during which the course shall begin. Candidates should note that they should be unmarried and male for applying to this exam. Candidates who will be appearing for the National Defence Academy (NDA) will be required to appear the exam in any one of the exam centers across the country. The exam centers for NDA include Agartala, Gangtok, Panaji (Goa), Ahmedabad, Hyderabad, Patna, Aizawl, Imphal, Port Blair, Allahabad, Itanagar, Raipur, Bangalore, Jaipur, Ranchi, Dispur, Nagpur are some of the centers. To get the complete list of centers candidates can visit the official website of Union Public Service Commission (UPSC).The interview is divided into 2 sections. The candidates are screened during the first day of the five-day process. The ones who are deemed fine are evaluated for qualities one would like to see in an officer. One should have a sense of responsibility and should be socially adaptable to different circumstances. Various questions could be asked during the interview process, such as- Why is it that you want to join Defence Forces, How will you react if you do not get recommended this time etc. The main reason that the Services Selection Board (SSB) interview is being conducted is for making a complete assessment of the personal qualities of the individual. This whole process is completed over a period of 5 days.The following is the paper pattern that is followed:Paper patternWritten Examination1. Mathematics (Objective type) 300 Marks2. General Ability Test (Objective type) 600 Marks Total marks for written examination 900 Marks Marks for SSB Interviews 900 MarksThe subject papers will comprise of only objective type questions. The test papers for mathematics and part b of the general ability tests shall be in Hindi and English. There will be negative marking for any wrong answers in the objective papers section.