Final answer:
The position of Defense Against the Dark Arts Teacher at Hogwarts is indeed cursed, as all of the professors who taught in that position during the seven years of the books served only one year.
Step-by-step explanation:
According to the information provided, it is true that the Defense Against the Dark Arts position at Hogwarts seems to be cursed. All of the professors who taught in that position during the seven years of the books served only one year, including Quirinus Quirrell, Gilderoy Lockhart, Remus Lupin, Alastor Mad-Eye Moody, Dolores Umbridge, Severus Snape, and Amycus Carrow. This pattern suggests a curse or some other hindrance that prevents teachers from staying in that position for more than one year.