A number of Google Groups members reported that the information in the Google AdWords Learning Center seems quite dated. For example, the old analytics was featured, but as we know, the old interface was deactivated on July 18th. Additionally, a person who had taken the exam in March said that a lot of the questions were "just plain wrong" because newer features have been added to Google AdWords and Google Analytics.
AdWordsPro wrote that the teams that are responsible for keeping the exam and learning center current have been notified, and this morning, I checked the learning center and it appears that the new Google Analytics is in fact highlighted in the learning center, so they must be listening and making these updates.
Forum discussion at Google Groups.