Db and storage

Question 1

What is the difference between instance stores and Amazon elastic block stores (EBS)?

Answer 1

Instance stores are temporary block level storage on an EC2 instance
Amazon EBS permanent block-level storage that remains after instance stops

Question 2

What is an Amazon EBS snapshot?

Answer 2

all data backed up and any changes after that are backed up

Question 3

What is Amazon Simple Storage Service (Amazon S3)?

Answer 3

provides object level storage

Question 4

What are the 3 parts of an s3 object in object storage?

Answer 4

data
meta
key

Question 5

What 2 factors should you consider when deciding which Amazon S3 service to use?

Answer 5

Frequency (how often will u retrieve data)
Availability

Question 6

What is the difference between Elastic Block Store and Elastic File System?

Answer 6

Elastic Block Store is single availability zone
Elastic File System is multiple availability zone

Question 7

Name 8 types of s3 storage?

Answer 7

Standard
Standard Infrequent Access
One-zone Infrequent access
Intelligent tiering
Glacier instant retrieval
Glacier flexible retrieval
Outposts

Question 8

Suitable storage for infrequent access from 1 location

Answer 8

One-zone infrequent access

Question 9

Suitable storage for archived data you need to retrieve instantly?

Answer 9

Glacier Instant Retrieval because you can retrieve it in a few milliseconds

Question 10

You need to store objects close to on premises apps. Which type of S3 storage should you use?

Answer 10

S3 Outposts

Question 11

Suitable storage for unknown patterns?

Answer 11

S3 Intelligent tiering

Question 12

Suitable for archived data that needs to be retrieved in a few mins to an hour?

Answer 12

S3 Glacier flexible retrieval

Question 13

Suitable for archived data you need to retrieve in 12 hours?

Answer 13

S3 Glacier deep archive

Question 14

You need to access data frequently from a minimum of 3 availability zones. Which type of S3 block storage should you use?

Answer 14

S3 Standard

Question 15

You only access data occasionally, but need to be able to retrieve it instantly and would not be able to reproduce it in the event of a failure. Which type of S3 block storage should you use?

Answer 15

S3 Standard IA

Question 16

You only need to access data ocassionally and would be able to easily reproduce the data in the event of a failure. Which type of S3 block storage should you use?

Answer 16

S3 One Zone-IA

Question 17

You aren’t sure which s3 storage to use because of unknown changing patterns. Which type of S3 block storage should you use?

Answer 17

S3 Intelligent-Tiering
If you don’t access an object for 30 days in a row, it will move you to S3 Standard-IA
If you access an object, it automatically moves it to the frequently accessed tier S3 standard

Question 18

What service do you use from relational dbs?

Answer 18

RDS (relational database service)?

Question 19

Name the relational db?

Answer 19

Aurora

Question 20

Name the key-value pair, nosql db?

Answer 20

Dynamodb

Question 21

What data warehousing service can you use for big analytics?

Answer 21

Redshift

Question 22

Name 3 areas database migration service helps with when migrating a db store?

Answer 22

1. Developing and testing migration
2. Consolidation
3. Continuous replication