Key points

• Applications address objects by bucket and key and authorize required object and bucket actions.
• Lifecycle rules transition or expire objects according to configured policy.
• S3 events can invoke supported targets, and S3 can store deployment artifacts and Lambda asynchronous failure records.

Best-known use cases

• Durable application object storage and retrieval.
• Store artifacts, static content, event inputs, and lifecycle-managed objects.

What candidates often confuse it with

• S3 is object storage; DynamoDB is key-value/document record storage.
• S3 lifecycle applies object retention transitions or expiration; DynamoDB TTL marks table items for eventual deletion.

Key takeaway

Use S3 for object-oriented persistence and integrate events, lifecycle, encryption, and permissions deliberately.

Related services

• AWS Lambda
• Amazon CloudFront
• Amazon Athena
• AWS Key Management Service (AWS KMS)

Relevant exam tasks

• D1.2 — Develop code for AWS Lambda
• 1.2.5 — Integrate Lambda functions with AWS services
• D1.3 — Use data stores in application development
• 1.3.6 — Use, manage, and maintain data stores
• 1.3.7 — Manage data lifecycles
• D3.1 — Prepare application artifacts to be deployed to AWS
• 3.1.1 — Manage the dependencies of the code module (for example, environment variables, configuration files, container images) within the package

Learn more

• Amazon S3