AWS Base Knowledge

Question 1

In a URL what is a subdomain?

Answer 1

A subdomain is the xxx.keith-tobin.com.

Question 2

In a URL what is a subdirectory?

Answer 2

A subdirectory is the part of the domain after the /

Question 3

Does PV AMI support enhance networking?

Answer 3

No only HMV AMI

Question 4

What is the throughput?

Answer 4

How much data y

ou can move

Question 5

What is network speed?

Answer 5

How fast you can send data

Question 6

What is IOPS?

Answer 6

How fast you can read and write data to a device

Question 7

What is ACID in a consistency model?

Answer 7

The ability to group transactions and have them stored all or nothing.
- Consistent - Valid
- Isolated - independent and can mess with other transactions
Durable

Question 8

What is BASe in a consistency model?

Answer 8

• Basic availability - values availability even if data is stale.
• Soft state - may instantly not be consistent across all stores
• Eventual consistency - will achieve consistency across all stores eventually.

Question 9

What is RAID 0

Answer 9

Raid 0 stripes data across disks for higher throughput

Question 10

What is RAID 1

Answer 10

Raid 1 mirrors data on disks

Question 11

What is RAID 5

Answer 11

Striping with parity

Question 12

What is RAID 6

Answer 12

Striping with an extra parity

Question 13

What is RAID 10

Answer 13

Raid 1 and 2 combilned

Question 14

What is High Availability

Answer 14

It is the ability to recover from a failure, an example is having a second server that you failover to.

Question 15

What is fault tolerance?

Answer 15

It is the ability of a system to keep working in the event of a failure.

Question 16

What is DR?

Answer 16

You take that somewhere else and start again.

Question 17

What are RTO and RPO?

Answer 17

RPO is the recovery point, this is the time between last backup and the outage. RTO is recovery time, this is the time taken to recover from an outage.

Question 18

What is ephemeral storage?

Answer 18

This type of storage goes away when the resource is powered off. Instance stored volumes, Amazon ElasticCache.

Question 19

What is transient storage?

Answer 19

This is like a queue.

Question 20

What is persistent storage?

Answer 20

This is where data is stored even when data is powered off EBS, S3

Question 21

What are the 7 OSI layers?

Answer 21

Application (HTTP)
Presentation (SSL)
Session (socket)
Transport (TCP Port)
Network (IP 192.168.0.1)
Data Link (Frames)
Physical (physical ethernet)

Question 22

What are the 5 WAF pillars?

Answer 22

Reliability
Preformance
Cost optimization
Operational excellence
Security

Question 23

How many support plans have AWS?

Answer 23

3 main support plans

• Developer
• Buisness
• Enterprise

Question 24

What types of storage have we in AWS?

Answer 24

• EBS: Instances storage
• -gp2: General purpose storage, SSD, burst)
• • io1: provisioned
• -st1: HDFS, write throughput, larger then GP2
• -st2: Block archive
• S3
• -Standard
• -Standard IA
• -Zone IA
• -Reduce redundancy
• -Intelligent tiering
• -Glacier
• -FSx (SMB, Windows)
• -EFS (NFS 4)
• -Storage GW

Question 25

I have data stored in S3 and I need to transform it and push the transformed data to DynamoDB, what AWS service would I use?

Answer 25

AWS Glue

Question 26

Is s3 a global or regional service?

Answer 26

It is a global service with regional storage. Data is stored across multiple AZs within a single region, 3 or more AZ’s. For OneZone their data is only stored in a single zone.

Question 27

Is Route53 a global or regional service or something else?

Answer 27

Route53 operates from AWS edge locations.

Question 28

Are ELBs regional or global?

Answer 28

Regional, ELBs are deployed to one or more AZ’s in a region.