Plot hole: One of Snape's memories show Lily telling baby Harry to be safe, be strong. That had to have occurred before Voldemort killed Lily. Snape was not in the house until after Lily was killed and Voldemort was gone. Only Lily and Harry should have had that memory, but not Snape.
Plot hole: Immediately after the confrontation between Harry/McGonagall and Snape in the Great Hall, Harry runs up to Ravenclaw tower against crowds of students running the opposite direction. However, all the students would have been in the Great Hall during that confrontation, and therefore would have been coming from the same direction as Harry.
Answer: Yes. According to J.K. Rowling in interviews, the curse Voldemort had cast on the Defense Against the Dark Arts position preventing any teacher lasting more than one year, was finally broken upon his death, and from then on any instructor lasted beyond twelve months.
raywest ★
In the movies it is never mentioned that Voldemort cursed the DADA post or even applied for this position.
It is mentioned in the books.