"To pass this examination you will be required to show that you understand magical beings other than witches or wizards; that you recognize and know the use of various magical objects; that you have an awareness of wizarding current affairs, and that you have a working knowledge of the Muggle world alongside which we must live."
-- J K Rowling's original website
W.O.M.B.A.T. Test – Grade 2
The Grade 2 W.O.M.B.A.T. test appeared on J K Rowling’s website between September 29 and October 4, 2006.
The test consisted of questions which required an extensive knowledge of canon and an intuitive understanding of the Wizarding world to answer. A number of the questions required educated guesses, since sufficient information to answer them definitively was not available.
From the Web
The W.O.M.B.A.T. tests reformatted: Reddit.com post