Ans: The International Olympiad on Astronomy and Astrophysics (IOAA) is related to the practical applications of Astronomy. Students need to have complete knowledge of the subject to sit for the examination. Only those who had taken up the Science stream in their plus II level are eligible to sit for the examination. They should have a stronghold on physics to relate it with Astronomy and achieve the desired outcome. Regular practice related to the subject and increasing one’s analytical skills will go a long way in the preparation process.