1. Who attacks Harry and his cousin Dudley when they are walking in the alleyway between Magnolia Crescent and Wisteria Way on their way back to number 4 Privet Drive?
Two Dementors from Azkaban

2. Who is Mrs. Figg?
All of the above

3. Tonks, who does not like to be called by her first name (Nymphadora), is a Metamorphmagus. What kinds of powers does this mean she has?
She can change her appearance at will

4. What is the Order of the Phoenix?
Dumbledore's secret society of witches and wizards who fight Lord Voldemort and his supporters

5. Who does Dumbledore name as the Gryffindor prefects?
Ron and Hermione

6. Hagrid reveals to his class that he is in possession of perhaps the only tame herd of Thestrals in Britain. Thestrals are large reptillian-like horses with large leathery wings. Who can see them?
Only a person who has witnessed a death can see them

7. When Dumbledore is unable to find a replacement for Mad-Eye Moody for the Defense Against the Dark Arts position, the Ministry of Magic appoints the frog-like Dolores Umbridge. What other positions does Dolores later obtain?
High Inquisitor of Hogwarts and Headmistress

8. "Harry, Ron, Hermione and all of the other fifth years are taking their O.W.L.s this year, but the grading system at Hogwarts works a little differently than at most schools. Getting an O means "Outstanding," an E means "Exceeds Expectations," and an A, "Acceptable." After that students receive a P for "Poor," a D for "Dreadful," and a T for:
Troll

9. What happens when boys try to get into the girls' dormitories?
There is a loud wailing noise and the stairs melt into a slide so that no one can climb them.

10. What room does Dobby suggest to Harry as a good place for the D.A. to meet for their practices?
The Room of Requirement