Radar is something that is in use all around us, although it is normally invisible. ATC (Air Traffic Control) uses radar to track planes both on the ground and in the air, and also to guide planes in for smooth landings. Police use radar to detect the speed of passing motorists. NASA uses radar to map the Earth and other planets, to track satellites and space debris and to help with things like docking and maneuvering. The military uses it to detect the enemy aircraft, ships, submarines and to guide weapons. This is a basic level quiz covering a wide range of radar architecture (and design) principles and radar operations. Here, in this quiz, the figures “Number of Questions In Actual Exam”, “Time Allowed In Actual Exam” and “Passing Percentage” are just arbitrary values and as such they have no significance in the context of this test.