AWS Certified Solutions Architect Associate

Question 1

Is S3 an object based storage service?

Answer 1

Yes

Question 2

In S3, do you have to be concerned about file systems or disk space?

Answer 2

No

Question 3

What is a data storage architecture that manages data as object as opposed to file systems for block storage?

Answer 3

Object Storage

Question 4

What is an S3 Object?

Answer 4

Objects contain your data. They are like files.

Question 5

What do S3 Objects consist of?

Answer 5

1. Key - the name of the object
2. Value - the data itself made up of a sequence of bytes
3. Version ID - the version of the object when versioning is enabled
4. Metadata - additional information attached to the object

Question 6

How much data can you store in a S3 Object?

Answer 6

0 bytes to 5 Terabytes

Question 7

Does a S3 bucket name have to be unique like a domain name?

Answer 7

Yes

Question 8

What do S3 buckets hold?

Answer 8

1. Objects

2. Folders which in turn hold objects

Question 9

What are the S3 Storage Classes?

Answer 9

1. Standard (default)
2. Intelligent Tiering
3. Standard Infrequently Accessed (IA)
4. One Zone IA
5. Glacier
6. Glacier Data Archive

Question 10

What is the availability and durability of the Standard S3 Storage Class?

Answer 10

Availability - 99,99%

Durability - eleven 9’s

Question 11

How many AZs is Standard S3 Storage Class replicated across?

Answer 11

At least 3

Question 12

What S3 Storage Class is fast and cheaper than the Standard Storage Class if you access files less than once per month?

Answer 12

Standard Infrequently Accessed (IA)

Question 13

Is there a charge for accessing Standard Infrequently Accessed files?

Answer 13

Yes, there is a retrieval fee.

Question 14

How much less is Standard Infrequently Accessed file storage than Standard Storage?

Answer 14

50% less because of reduced availability

Question 15

Which Storage Class is still fast, but objects exist in only one AZ?

Answer 15

One Zone IA

Question 16

What is the Availability of One Zone IA?

Answer 16

99.5%

Question 17

How much cheaper is One Zone IA than Standard S3 Storage?

Answer 17

20% lower (reduced durability)

Question 18

Can data get destroyed on a One Zone IA?

Answer 18

Yes

Question 19

Is there a retrieval fee for One Zone IA?

Answer 19

Yes

Question 20

What is a long-term cold storage class?

Answer 20

Glacier

Question 21

What are the advantages and disadvantages of Glacier?

Answer 21

Advantage - very cheap

Disadvantage - retrieval can take minutes to hours

Question 22

What is the lowest cost storage class?

Answer 22

Glacier Data Archive

Question 23

What is the data retrieval time for Glacier Data Archive?

Answer 23

12 hours

Question 24

What Storage Class used Machine Learning to analyze object usage and determine the appropriate storage class?

Answer 24

Intelligent Tiering

Question 25

What Storage Class moves data to the most cost-effective access tier without any performance impact or added overhead?

Answer 25

Intelligent Tiering

Question 26

What are the S3 availability and durability guarantees?

Answer 26

- Platform is built for 99.99% availability - Amazon guarantees 99.9% availability - Amazon guarantees eleven 9's of durability

Question 27

Are all new buckets private when created by default?

Answer 27

Yes

Question 28

Access control is configured using what two things?

Answer 28

Bucket Policies - to define complex rule access | Access Control Lists - simple way of granting access

Question 29

Traffic between your local host and S3 is achieved via

Answer 29

SSL/TLS

Question 30

What is Encryption at Rest

Answer 30

Server Side Encryption (SSE)

Question 31

Does Amazon help you encrypt object data with SSE?

Answer 31

Yes

Question 32

Who manages all of the S3 managed keys with SSE?

Answer 32

Amazon

Question 33

What is S3 handles the key and uses AES-256 Algorithm called

Answer 33

SSE-AES

Question 34

What is S3 envelope encryption, AWS KMS and you manage the keys

Answer 34

SSE-KMS

Question 35

What is customer provided key and you manage the keys

Answer 35

SSE-C

Question 36

What is it called when you encrypt your own files before uploading them to S3?

Answer 36

Client-Side Encryption

Question 37

With S3 Data Consistency, when is a new S3 object that has been put to S3 available for read action

Answer 37

immediately

Question 38

With S3 Data Consistency, how long before an overwrite (put) or delete objects (deletes) are available?

Answer 38

It takes time for S3 to replicate versions to AZ. If you were to read immediately, S3 may return an old copy. You need to generally wait a few seconds before reading.

Question 39

Can you automatically replicate objects from one region to another?

Answer 39

Yes - it is called Cross Region Replication or CRR

Question 40

Can you use Cross Region Replication with a different AWS account?

Answer 40

Yes

Question 41

What do you have to have turned on with both the source and destination buckets to use Cross Regional Replication (CRR)?

Answer 41

versioning

Question 42

Explain S3 Versioning

Answer 42

- Store all versions of an object in S3 - Once enabled it cannot be disabled, only suspended on the bucket - Fully integrates with S3 Lifecycle rules - MFA delete feature provides extra protection against deletion of your data