Introduction to S3

Question 1

What is S3?

Answer 1

Secure, durable, highly-scalable object storage.

Question 2

Can you host simple websites in S3?

Answer 2

Yes. S3 can host static web content.

Question 3

Is S3 object or block storage?

Answer 3

Object

Question 4

How does AWS host and scale data in the S3 service?

Answer 4

Data is spread across multiple devices and facilities.

Question 5

What file size restrictions does S3 have? (how small/large can an object be?)

Answer 5

0 bytes to 5TB

Question 6

Can two accounts have the same S3 bucket name?

Answer 6

No. S3 buckets are universal and each must be unique.

Question 7

what HTTP code is given after a successful upload to S3?

Answer 7

200

Question 8

what is the data consistency for PUTS of new objects?

Answer 8

read after write

Question 9

What is the data consistency for overwrite PUTS and DELETES

Answer 9

Eventual consistency (can take some time to propagate)

Question 10

How is data organized in S3

Answer 10

Key Value pairs

Question 11

What is a Key in S3 object’s key/value pair?

Answer 11

The name of the file

Question 12

What is the Value of an S3 object’s key/value pair?

Answer 12

The data of the object

Question 13

In S3, how are file versions kept track of?

Answer 13

Version ID

Question 14

In S3, can you add additional information about objects? How

Answer 14

Metadata. Usually as tags.

Question 15

In S3, what is a subresource of an object?

Answer 15

bucket policies
cross origin resource sharing
transfer accelleration

Question 16

What is S3’s availability design?

Answer 16

99.99%

Question 17

What does Amazon gaurentee for S3 availabiltiy?

Answer 17

99.9%. S3 is designed for 99.99% (4x9), but gaurenteed at 99.9% (3x9).

Question 18

What is Amazon gaurentee for S3 durability?

Answer 18

99.999999999% (11x9)

Question 19

What is the difference between availability and durability?

Answer 19

Availability is the ability for data to be retrievable

Durability is protection from data loss or corruption

Question 20

How many availability zone losses can S3 sustain?

Answer 20

2 concurrent availability zones.

Question 21

Which S3 storage class is used for less frequently accessed data that still requires rapid access?

Answer 21

S3 - IA (Infrequently Accessed)

Question 22

True or False: S3 - IA has retrieval fees?

Answer 22

True. Storage costs are lower than S3 standard, but come with a retrival fee when accessed.

Question 23

What is S3 - One Zone?

Answer 23

Same as IA, but data is stored in a single availability zone, reducing availabilty to 99.5%. Lower storage cost

Question 24

How much cheaper is S3 - One Zone than S3 - IA

Answer 24

20% cheaper

Question 25

What is Glacier?

Answer 25

Very cheap data archival service.

Question 26

What is the standard retrieval time for Glacier?

Answer 26

3-5 hours

Question 27

What are the object storage classes that exist in AWS?

Answer 27

S3 standard
S3 standard IA
S3 onezone IA
Glacier
RRS - Reduced Redundancy Service; this is being depricated, and may or may not appear on the exam.

Question 28

What S3 charges are there?

Answer 28

Storage per GB
Requests
Storage management
Egress
Transfer acceleration

Question 29

What is S3’s storage limit

Answer 29

There is no limit on storage, only file sizes

Question 30

Can you install operating systems or other software onto S3?

Answer 30

No.

Question 31

What are S3 storage instances called?

Answer 31

Buckets

Question 32

What is the use case for S3 standard?

Answer 32

need for durable, immediatly available and frequently accessed data

Question 33

What are the core fundamental of an S3 object?

Answer 33

Key
Value
Version ID
Metadata
Subresources

Question 34

True or False, you should read the S3 FAQ?

Answer 34

True. https://aws.amazon.com/S3/faqs