This is the last day of Week 5. We'll finish looking at three advanced features — S3 event notifications, Presigned URLs, and static website hosting — and then organize everything about S3 we learned over the past four days from an exam perspective. S3 is one of the services with the most questions on the DVA-C02. If you understand "why it works that way" rather than just memorizing, you won't be shaken by variant questions.