Storage Services

Question 1

What is the maximum size a file can be in S3?

Answer 1

5TB

Question 2

What is the durability of most S3 storage classes?

Answer 2

99.999999999%

9 9s

Question 3

Which S3 storage class offers the most durability and availability?

Answer 3

Standard (the default class)

Question 4

Which S3 storage class has the lowest durability but the same availability as the standard class?

Answer 4

Reduced_Redundancy

Question 5

Which S3 storage class has the lowest availability?

Answer 5

OneZone_IA (at 99.5%)

Question 6

How long could it take to retrieve data from Glacier?

Answer 6

12 hours

Question 7

Which S3 storage class is offered for both frequent and infrequent access?

Answer 7

Intelligent_Tiering

Question 8

What are the three ways you can control who can access your S3 bucket and how?

Answer 8

Bucket policies

User policies

Bucket and object access control limits

Question 9

What are the two options for encryption at rest (in regards to S3)?

Answer 9

Server-side encryption (AWS does all the work for you)

Client-side encryption (You are responsible for encryption/decryption)

Question 10

What are the two types of actions that can be applied to the object life cycle configuration rules?

Answer 10

Transition

Expiration

Question 11

What is the difference between a vault and an archive?

Answer 11

An archive is a block of information and can hold anywhere from 1 byte to 40TB of data. A vault is a region-specific container that stores archives.

Question 12

How long does it take to retrieve data with the Expedited option?

Answer 12

Typically 1-5 minutes (costs $0.03/GB)

Question 13

How long does it take to retrieve data with the Standard option (AWS Glacier)?

Answer 13

Typically 3-4 hours (costs $0.01/GB)

Question 14

How long does it take to retrieve data with the Bulk option?

Answer 14

Typically 5-12 hours (costs $0.0025/GB)

Question 15

What is AWS Storage Gateway?

Answer 15

It connects your existing on-premises servers to storage in the AWS cloud using a VM. Think “local storage.”

Question 16

What are the three different types of VM for Storage Gateway?

Answer 16

File Gateways - Stores data in S3 but caches locally for low-latency access (uses NFS and SMB)

Volume Gateways - Stored volumes and cached volumes, takes EBS snapshots of volumes and stores them on S3 (uses iSCSI protocol)

Tape Gateways - mimics traditional tape backup infrastructure

Question 17

What are the two pricing options for Snowball?

Answer 17

80TB - $250 (stores up to 72TB)

50TB - $200 (stores up to 42TB)

Note: You can keep Snowball for 10 days without incurring extra costs (each additional day costs $15)

Question 18

Which S3 storage classes are most cost-effective for infrequently accessed data that can’t be easily replaced?

Answer 18

STANDARD_IA

GLACIER

Question 19

Which types of AWS Storage Gateway let you connect your servers to block storage using the iSCSI protocol?

Answer 19

Tape
Volume

Note: The file gateway supports NFS.