Storage Technologies

Question 1

Where are S3 buckets defined?

Answer 1

At the region level

Question 2

Can you use uppercase or underscore in an S3 name?

Answer 2

No

Question 3

Can the S3 object start with the prefix xn–?

Answer 3

No

Question 4

Can the S3 object end with -s3alias?

Answer 4

No

Question 5

What is the KEY in AWS S3?

Answer 5

It is the filename including any sub folders under the bucket.

Question 6

What is the PREFIX in AWS S3?

Answer 6

They key is composed of all the sub folders.

Question 7

Can you upload files to S3 larger than 5GB?

Answer 7

Yes, but you must use multi-part upload.

Question 8

Does suspending versioning delete previous versions?

Answer 8

No

Question 9

What version number is given to files that are not versioned prior to enabling versioning?

Answer 9

They will have a version “null” value

Question 10

Are existing objects replicated when you enable replication in S3?

Answer 10

No, Only new files are replicated.

Question 11

If you want to replicate existing objects in S3 after enabling versioning, what can you use?

Answer 11

S3 Batch Replication

Question 12

Are delete markers included in S3 replication?

Answer 12

Not by default. This must be enabled.

Question 13

What is S3 Glacier Instant Retrieval?

Answer 13

90 day minimum retention
millisecond retrieval
Great for data accessed once a quarter

Question 14

What is S3 Glacier Flexible Retrieval?

Answer 14

90 day minimum retention
Expedited - 1 to 5 minutes
Standard - 3-5 hours
Bulk - 5 - 12 hours

Question 15

When using a lifecycle policy, where do you configure objects to transition to another storage class?

Answer 15

Using transition actions

Question 16

Can you schedule items to be deleted using lifecycle policies?

Answer 16

Yes. This is done using expiration actions.

Question 17

At what file size is multipart upload recommended?

Answer 17

100MB

Question 18

How can you retrieve only partial data from an S3 file?

Answer 18

You can use AWS Byte Range Fetches

Question 19

What can you use in S3 to retrieve less data by using SQL to perform server-side filtering?

Answer 19

S3 SELECT or GLACIER SELECT

Question 20

What is SSE-S3 encryption?

Answer 20

This is enabled by default and uses AWS managed keys

Question 21

What is SSE-KMS?

Answer 21

This is when you want to leverage KMS to manage encryption keys

Question 22

What is SSE-C?

Answer 22

When you want to manage your own encryption keys.

Question 23

How can you force TLS encryption in S3?

Answer 23

Use a buckey policy to deny any getObject requests that have a condition of secureTransport = “false”

Question 24

What is a good use case for S3 access points?

Answer 24

When you have folders in a bucket that you want to limit access to. You can have an access point for each folder that ties back to a specific group of users. This simplifies S3 management.

Question 25

What is an access point policy?

Answer 25

It is similar to a bucket policy and allows you to manage security at scale.

Question 26

When you want to connect privately to an S3 access point from a VPC, what needs to be done?

Answer 26

A VPC endpoint must be created to it can access the access point (VPC origin)

Question 27

What are good use cases for S3 Object Lambdas?

Answer 27

PII redaction, watermarking, and data transformation.

Question 28

What protocol does AWS EFS use?

Answer 28

NFS

Question 29

Does EFS scale automatically?

Answer 29

Yes

Question 30

When is performance mode set for EFS?

Answer 30

When you create the EFS volume

Question 31

Can EFS support multiple AZs?

Answer 31

Yes