Simple Storage Service (S3)

Question 1

What geographical context are S3 buckets contained?

Answer 1

Regional

Question 2

How is an object replicated in S3?

Answer 2

Multiple copies of an object in multiple availability zones

Question 3

What is the durability of an object stored in S3 standard?

Answer 3

99.999999999%

Eleven 9s

Question 4

What is the availability of an object stored in S3 standard?

Answer 4

99.99%

Four 9s

Question 5

Difference between durability and availability?

Answer 5

Durability is the probability of data not suffering loss.

Availability is the uptime percentage of an object.

Question 6

True or false: S3 buckets names must be unique in its given region?

Answer 6

False: Bucket names must be unique globally, meaning no other bucket may be named the same as another across all of AWS.

Question 7

Define S3

Answer 7

Full managed, highly available, highly durable, cost-effective and widely accessible object-based storage service.

Question 8

What is the maximum storage s3 offers?

Answer 8

Unlimited

Question 9

What are the minimum and maximum storage sizes per object in S3?

Answer 9

Minimum = 0 bytes
Maximum = 5 terabytes

Question 10

What are the three storage classes in S3?

Answer 10

Standard
Standard - Infrequent Access
Reduced Redundancy

Question 11

What security control access controls are present in S3?

Answer 11

Bucket policies, Access Control Lists, Data Encryption, SSL Support

Question 12

What data management features are in available in S3?

Answer 12

Versioning

Lifecycle rules

Question 13

True or False: S3 does not integrate with other AWS services?

Answer 13

False: S3 integrates with many AWS service

Question 14

What are S3 charges primarily based upon?

Answer 14

Amount of storage used
requests
data transfer

Question 15

Define Amazon Glacier

Answer 15

An extremely low cost, long term storage solution ideally suited for long term backup and archival requirements.

Question 16

What is the durability rating of Glacier?

Answer 16

Eleven 9s.

Question 17

While Glacier is much cheaper than S3, what are some of the key differences between S3 and Glacier?

Answer 17

There is no instant access to data

Data is stored in vaults and archives

Question 18

How many archives are you allowed to make in Glacier?

Answer 18

Unlimited

Question 19

What can you do in the Glacier console?

Answer 19

You are limited to creating vaults

Question 20

To move data into and out of Glacier, what are your options?

Answer 20

Glacier service API
AWS SDK
Lifecycle policies

Question 21

What are the three storage retrieval options?

Answer 21

Expedited
Standard
Bulk

Question 22

True or False: Encryption is enabled by default in Glacier?

Answer 22

True

Question 23

What encryption algorithm is used in Glacier?

Answer 23

AES-256

Question 24

What access control options are available in Glacier?

Answer 24

IAM
Vault access policies
Vault lock policies

Question 25

True or false: The more storage you use in Glacier, the lower the price per GB?

Answer 25

False: In Glacier, the price is always the same regardless of the amount used.

Question 26

What is the primary function of Glacier?

Answer 26

Archival of data for extended periods of time for a very small cost.

Question 27

What is the terminology used to describe the archival of data for extended periods of time?

Answer 27

Cold storage

Question 28

How is an EC2 instance store volume attached to an EC2 instance?

Answer 28

Directly and physically on the same host as the EC2 instance.

Question 29

What is the primary function of EC2 instance store?

Answer 29

To provide ephemeral storage for EC2 instances

Question 30

Why should you not use EC2 storage for critical, valuable data or data with a long term availability need?

Answer 30

If the instance is stopped or terminated, the data on the instance store is lost.

Question 31

True or false: data stored on EC2 instance store will be lost upon reboot?

Answer 31

False: Data will persist across an instance reboot. Only stopping or terminating an instance will result in data loss.

Question 32

True or false: EC2 instance store is a separate charge from EC2 compute and memory charges?

Answer 32

False: Instance store is included in EC2 charges.

Question 33

What advantage does EC2 instance store have?

Answer 33

Very high I/O speeds

Question 34

Due to I/O speeds of an EC2 instance store, what use cases make sense for instance store?

Answer 34

As a cache or buffer.