it is a test to check your knowledge on the wizarding world.
precedure to take the test,
on JKR's website, when the full view of table would load, click on the eraser.
a new window would load where u can see the picture of a wall with a door and a window.
click on the fly and it'll become a key.
drag the key and open the keylock in the door
arrange the shapes . first triangle, then line on triangle , then circle on line
open the test paper
proceed with ur test
finally after answering the questions copy the id provided [it'll help u retrieve your score later ]
good luck :p ... some questions are very tough and some answers would earn you a negative mark