Q. Amazon Simple Storage Service (Amazon S3) is an eventually consistent storage system. For what kinds of operations is it possible to get stale data as a result of eventual consistency?
A. Amazon S3 provides read-after-write consistency for PUTs to new objects (new key), but eventual consistency for GETs and DELETEs of existing objects (existing key).
Q. You have valuable media files hosted on AWS and want them to be served only to authenticated users of your web application. You are concerned that your content could be stolen and distributed for free. How can you protect your content?
A. Pre-signed URLs allow you to grant time-limited permission to download objects from an Amazon Simple Storage Service (Amazon S3) bucket. Static web hosting generally requires world-read access to all content. #AWS IAM policies do not know who the authenticated users of the web app are. Logging
can help track content loss, but not prevent it.
Q. Amazon Glacier is well-suited to data, explain how?
A. Amazon Glacier is optimized for long-term archival storage and is not suited to data that needs immediate access or short-lived data that is erased within 90 days.
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