The Part 107 test is applicable since August 2016. If someone wants to fly a drone, they must clear the test and get a permit to do drone flying. The test is under the administration, control, and requirements of the US aviation and control authority. The Part 107 test covers all provisions of flying a drone, and the people who clear the test get the license and rules to fly the drone.
The test is not an easy one, and people who are serious about flying drones should study for the exam properly before giving it an attempt. There are schools such as the aeronautical training centers where you can apply to prepare for the test. With proper learning and practical sessions on flying the drones, the likelihood of you clearing the test on your first attempt increases. With the permit, you can take your drone and enjoy flying the machine!