AWS General

Question 1

What are IOPS?

Answer 1

OPS (Input/Output Operations Per Second) measures the speed of a storage device.
It indicates how many read/write operations a device can perform each second.
Higher IOPS means better performance, especially for high-demand applications.

Question 2

What is Throuput in the context of storage?

Answer 2

It measures the capacity to move data to and from the storage device.

Question 3

What is an ACID transaction regarding a database?

Answer 3

ACID is when a transaction and all its components are committed in an all-or-nothing situation.

Question 4

What is the BASE consistency model?

Answer 4

Basic availability - values available even when stale.

Soft-state might not be instantly consistent across stores.

Eventual consistency will be achieved at some point in time.

Question 5

What services have BASE associated with them?

Answer 5

S3
DynamoDB

Question 7

In a URL what is a subdomain?

Answer 7

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

Question 8

In a URL what is a subdirectory?

Answer 8

A subdirectory is the part of the domain after the /

Question 9

Does PV AMI support enhance networking?

Answer 9

No only HMV AMI

Question 10

What is the throughput?

Answer 10

How much data y

ou can move

Question 11

What is network speed?

Answer 11

How fast you can send data

Question 12

What is IOPS?

Answer 12

How fast you can read and write data to a device

Question 13

What is ACID in a consistency model?

Answer 13

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

Question 14

What is BASe in a consistency model?

Answer 14

• 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 15

What is RAID 0

Answer 15

Raid 0 stripes data across disks for higher throughput

Question 16

What is RAID 1

Answer 16

Raid 1 mirrors data on disks

Question 17

What is RAID 5

Answer 17

Striping with parity

Question 18

What is RAID 6

Answer 18

Striping with an extra parity

Question 19

What is RAID 10

Answer 19

Raid 1 and 2 combilned

Question 20

What is High Availability

Answer 20

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

Question 21

What is fault tolerance?

Answer 21

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

Question 22

What is DR?

Answer 22

You take that somewhere else and start again.

Question 23

What are RTO and RPO?

Answer 23

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 24

What is ephemeral storage?

Answer 24

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

Question 25

What is transient storage?

Answer 25

This is like a queue.

Question 26

What is persistent storage?

Answer 26

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

Question 27

What are the 7 OSI layers?

Answer 27

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

Question 28

What are the 5 WAF pillars?

Answer 28

``` Reliability Preformance Cost optimization Operational excellence Security ```

Question 29

How many support plans have AWS?

Answer 29

3 main support plans - Developer - Buisness - Enterprise

Question 30

What types of storage have we in AWS?

Answer 30

- 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 31

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 31

AWS Glue

Question 32

Is s3 a global or regional service?

Answer 32

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 33

Is Route53 a global or regional service or something else?

Answer 33

Route53 operates from AWS edge locations.

Question 34

Are ELBs regional or global?

Answer 34

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