Harry Potter and the Deathly Hallows: Quiz IV (Advanced) by Mark ZurloSPOILER WARNING! This quiz covers all of Harry Potter and the Deathly Hallows. If you have not read the book, do not take this quiz! Question 1 (out of 10): To which prison was Gellert Grindelwald sent after he was defeated by Dumbledore in 1945? Kings Cross Prison London City Penitentiary Nurmengard Azkaban FEN Learning is part of Sandbox Networks, a digital learning company that operates education services and products for the 21st century.