S3 - Lifecycle Rules/Requestor Pays/Event Notifications/Batch Operations/`Storage Lens

Question 1

What is the purpose of Amazon S3 Lifecycle Rules?

Answer 1

To automate the transition of objects between storage classes and manage object expiration.

Question 2

What are the components of an S3 Lifecycle Rule?

Answer 2

Transition actions, expiration actions, and filters (prefixes or tags).

Question 3

How do transition actions work in S3 Lifecycle Rules?

Answer 3

They move objects to lower-cost storage classes after a specified number of days.

Question 4

Give an example of a transition action.

Answer 4

Move objects to Standard-IA after 60 days or to Glacier after 6 months.

Question 5

What do expiration actions do in S3 Lifecycle Rules?

Answer 5

They delete objects, old versions, or incomplete multi-part uploads after a specified time.

Question 6

How can you manage objects that are infrequently accessed?

Answer 6

Transition them to Standard-IA or One-Zone-IA using lifecycle rules.

Question 7

How can S3 Lifecycle Rules handle versioned objects?

Answer 7

Non-current versions can be transitioned to lower-cost storage classes or deleted.

Question 8

What tool helps determine the optimal time to transition objects between classes?

Answer 8

Amazon S3 Analytics.

Question 9

Can objects be transitioned between any storage classes?

Answer 9

Yes, but the transitions must follow the supported paths (e.g., Standard → Standard-IA → Glacier).

Question 10

What is a common scenario for using One-Zone-IA?

Answer 10

Storing secondary copies of backups or data that can be easily recreated.

Question 11

What is the S3 Requester Pays feature?

Answer 11

A feature where the requester, not the bucket owner, pays for the data transfer costs associated with downloading objects.

Question 12

Who pays for the storage costs in an S3 Requester Pays bucket?

Answer 12

The bucket owner.

Question 13

When should you consider using the S3 Requester Pays feature?

Answer 13

When sharing large datasets and you want the requester to bear the data transfer costs.

Question 14

Can anonymous users use S3 Requester Pays buckets?

Answer 14

No, the requester must be authenticated with AWS.

Question 15

Why must the requester be authenticated in S3 Requester Pays buckets?

Answer 15

To ensure AWS can bill the requester for the data transfer costs.

Question 16

What are S3 Event Notifications?

Answer 16

A feature that allows you to react to events in Amazon S3, such as object creation, removal, or replication.

Question 17

What destinations can S3 Event Notifications send to?

Answer 17

SNS topics, SQS queues, Lambda functions, and Amazon EventBridge.

Question 18

What is required to enable S3 Event Notifications for an SNS topic?

Answer 18

An SNS resource access policy to authorize the S3 bucket to send messages to the topic.

Question 19

What policy is required for S3 Event Notifications to send to an SQS queue?

Answer 19

An SQS resource access policy to allow the S3 service to send messages to the queue.

Question 20

What is needed for S3 to invoke a Lambda function using Event Notifications?

Answer 20

A Lambda resource policy that authorizes S3 to invoke the Lambda function.

Question 21

What are S3 Batch Operations?

Answer 21

A feature that allows you to perform bulk operations on existing S3 objects with a single request.

Question 22

What are the components of an S3 Batch Operation job?

Answer 22

A list of objects.
The action to perform.
Optional parameters.

Question 23

Why use S3 Batch Operations instead of scripting your own solution?

Answer 23

Built-in retry management.
Progress tracking.
Completion notifications.
Automatic report generation.

Question 24

How can you generate a list of objects for an S3 Batch Operation?

Answer 24

Use S3 Inventory to create an object list and S3 Select to filter the objects.

Question 25

What is the purpose of S3 Storage Lens?

Answer 25

To help you understand, analyze, and optimize storage across your AWS Organization by providing insights into anomalies, cost efficiencies, and data protection practices.

Question 26

How can S3 Storage Lens metrics be exported?

Answer 26

Metrics can be exported in CSV or Parquet format to an S3 bucket.

Question 27

Name some use cases for S3 Storage Lens metrics.

Answer 27

Identifying underused or fast-growing buckets.
Managing and optimizing storage costs.
Ensuring data protection best practices (e.g., versioning enabled buckets).
Understanding bucket ownership and event notifications.
Monitoring performance and activity (e.g., GET/PUT requests).

Question 28

What AWS service can S3 Storage Lens metrics be published to?

Answer 28

Amazon CloudWatch.