Introduction to AWS

Question 1

what is cloud computing

Answer 1

Cloud computing is the on-demand delivery of IT resources over the internet with pay-as-you-go pricing

Question 2

Who are the cloud Participants

Answer 2

cloud provider - provides access to cloud infrastructure and resources vis service level agreement (SLA)

Cloud Consumer - who access the cloud resource to develop and deploy solutions (applications)

End User - who uses the application deployed in the cloud. Does not have any knowledge about the application backend

Question 3

Advantages of cloud computing

Answer 3

1. Trade upfront expense for variable expense
2. Stop spending money to run and maintain data centers
3. Stop guessing capacity
4. Benefit from massive economies of scale
5. Increase speed and agility
6. Go global in minutes

Question 4

Benefit 1 - Trade upfront expense for variable expense

Answer 4

instead of investing heavily in data centers and servers before we know how we are gonna use those, we only pay for the resources we consume.

Question 5

what is upfront expenses/capital expenses

Answer 5

refers to data centers, physical servers, and other resources that you would need to invest in before using them.

Question 6

what is variable expense

Answer 6

you only pay for computing resources you consume

Question 7

Benefit 2 - Stop spending money to run and maintain data centers

Answer 7

with cloud computing we can focus less on maintain and managing infrastructure and servers. we can focus more on our applications.

Question 8

Benefit 3 - Stop guessing capacity

Answer 8

with cloud computing we don’t need to predict how much infrastructure capacity we will need before deploying an application. we can deploy applications and pay only for the resources we use. we can also scale in or out resources according to the demand.

Question 9

Benefit 4 - Benefit from massive economies of scale

Answer 9

we can achieve a lower variable cost than we can get on our own.
The economy of scale translates into lower pay-as-you-go prices

Question 10

Benefit 5 - Increase speed and agility

Answer 10

cloud computing enables you to access new resources within minutes. This flexibility provides you with more time to experiment and innovate.
in data centers we need to wait for weeks to obtain new resources.

Question 11

Benefit 6 - Go global in minutes

Answer 11

even if you are located in a different part of the world than your customers, customers are able to access your applications with minimal delays (low latency)

Question 12

cloud computing deployment models

Answer 12

cloud-based
on-premises
hybrid

Question 13

cloud-based deployment model

Answer 13

Run all parts of the application in the cloud.
Migrate existing applications to the cloud.
Design and build new applications in the cloud.

Question 14

On-premises deployment/ private cloud deployment

Answer 14

resources are deployed on premises by using virtualization and resource management tools.

Question 15

hybrid deployment

Answer 15

cloud-based resources are connected to on-premises infrastructure
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For example, suppose that a company wants to use cloud services that can automate batch data processing and analytics. However, the company has several legacy applications that are more suitable on premises and will not be migrated to the cloud. With a hybrid deployment, the company would be able to keep the legacy applications on premises while benefiting from the data and analytics services that run in the cloud.