S3

Question 1

Is S3 object based storage?

Answer 1

Yes

Question 2

What is the max file size for S3?

Answer 2

5TB

Question 3

Is S3 suitable for DB and OS Data?

Answer 3

No

Question 4

Whats the limit of storage for S3?

Answer 4

There is none. Its unlimited

Question 5

What does an S3 URL look like?

Answer 5

https://bucket-name.s3.region.amazonaws.com/key-name

Example:
alexcostasbucket.s3.us-east-1.amazonaws.com/babypicture.jpg

Question 6

When it comes to S3 objects what is the Key?

Answer 6

The object name. Such as babypicture.jpg

Question 7

When it comes to S3 objects what is the Value?

Answer 7

The data itself which is made up of a sequence of bytes.

Question 8

When it comes to S3 objects what is the metadata?

Answer 8

Data about the data you are storing. Such as content-type, last-modified etc

Question 9

Are S3 buckets private by default?

Answer 9

Yes

Question 10

What are Object ACLs used for with S3

Answer 10

Object ACLs allow you to make individual objects public, or unable to delete. etc

Question 11

In S3 can you make an entire bucket public using a bucket policy?

Answer 11

Yes

Question 12

Will you get an http 200 code if you successfully upload an object to S3?

Answer 12

Yes

Question 13

Can you disable versioning for an S3 bucket once you turn it on?

Answer 13

Nope, you can only suspend it.

Question 14

Can you use Lifecycle Rules with S3 versioning?

Answer 14

Yes, You can set it so your old object versions get moved to cold storage.

Question 15

What are the six different S3 Storage tiers?

Answer 15

1) Standard
2) Standard-infrequent Access
3) One Zone-Infrequent Access
4) Glacier
5) Glacier Deep Archive
6) Intelligent tiering

Question 16

What is S3 Standard best used for?

Answer 16

Suitable for most workloads, generic workloads.

Question 17

What is S3 Standard-Infrequent Access best used for?

Answer 17

Good for long term infrequently accessed but critical data. Like backups.

Question 18

What is S3 One Zone-Infrequent Access best used for?

Answer 18

Long term infrequent accessed but non critical data.

Question 19

What is S3 Glacier Flexible Retrieval? used for?

Answer 19

Long-term data archiving that occasionally needs to be accessed within a few hours or minutes.

Question 20

What is S3 Deep Archive used for?

Answer 20

Rarely accessed data archiving with default retrieval times of 12 hours. Used mostly for regulatory purposes.

Question 21

What is S3 Intelligent-Tiering used for?

Answer 21

Unknown or unpredictable access patterns.

Question 22

What is S3 Glacier Instant retrieval used for?

Answer 22

Low cost long term storage that you need to access within milliseconds.

Question 23

What does S3 Intelligent-Tiering do?

Answer 23

Uses machine learning to look at your data and automatically place it in tiers based on how often the data is accessed.

Question 24

What does WORM stand for?

Answer 24

Write Once Read Many

Question 25

What S3 feature would you use to make data follow the WORM model?

Answer 25

S3 Object Lock

Question 26

What are the two modes for S3 Object Lock?

Answer 26

1) Compliance 2) Governance

Question 27

What does S3 Object Lock's governance mode do?

Answer 27

Makes it so users can not overwrite or delete an object version r alter its lock settings unless they have special permissions.

Question 28

What does S3 Object Lock's compliance do?

Answer 28

Makes it so no user, not even root, can overwrite or delete the object.

Question 29

What does S3 Glacier Vault Lock do?

Answer 29

Allows you to easily deploy and enforce compliance controls for individual S3 Glacier vaults with vault lock policy. Can enforce WORM model on glacier

Question 30

Once you lock a policy with S3 Glacier Vault Lock can you edit it?

Answer 30

No

Question 31

What are the three encryption types for S3?

Answer 31

Encryption in Transit 1) SSL/TLS 2) HTTPS Encryption at Rest: SEE 1) Server-Side 2) SSE-S3 (AES 256-bit) 3) SSE-KMS 4) SSE-C Client-Side Encryption You encrypt them yourself before uploading them.

Question 32

What are the four types of encryption at rest for S3?

Answer 32

1) Server-Side 2) SSE-S3 (AES 256-bit) 3) SSE-KMS 4) SSE-C

Question 33

Can you enforce encryption with a bucket policy?

Answer 33

Yes

Question 34

What are prefixes in S3?

Answer 34

Folders and sub folders essentially

Question 35

How many PUT/COPY/POST/DELET requests do you get per S3 prefix?

Answer 35

3,500

Question 36

How many GET/HEAD requests per second, per prefix?

Answer 36

5,500

Question 37

Can you get better performance by spreading your reads across different S3 prefixes?

Answer 37

Yes

Question 38

If you use SSE-KMS for S3 will uploading/downloading count towards your KMS quota?

Answer 38

Yes

Question 39

What is the KMS quota limit?

Answer 39

This is region specific and can either be the following: 1) 5,500 2) 10,000 3) 30,000

Question 40

Can you request a quota increase for KMS?

Answer 40

No

Question 41

How big does a file have to be where you SHOULD start using multipart uploads for S3?

Answer 41

100mb

Question 42

What size does a file have to be where you HAVE to start using multipart uploads for S3?

Answer 42

5GB

Question 43

What is the download version of S3 Multipart Uploads called?

Answer 43

S3 byte-range fetches

Question 44

When you do S3 Replication, are the objects in the bucket automatically replicated?

Answer 44

No

Question 45

When you do S3 Replication, are objects with delete markers replicated by default?

Answer 45

No