To use Amazon EC2, you simply:

- Select a pre-configured, templated Amazon Machine Image (AMI) to get up and running immediately. Or create an AMI containing your applications, libraries, data, and associated configuration settings.

- Configure security and network access on your Amazon EC2 instance.

- Choose which instance type(s) you want, then start, terminate, and monitor as many instances of your AMI as needed, using the web service APIs or the variety of management tools provided.

- Determine whether you want to run in multiple locations, utilize static IP endpoints, or attach persistent block storage to your instances.

- Pay only for the resources that you actually consume, like instance-hours or data transfer.

Reference:

https://aws.amazon.com/ec2/features/

Key word "large set of users" = group

=> A

A and D. Route53 is AWS DNS Service and CloudFront is CDN so they are both global for sure.

A because:

AWS Artifact = on-demand access to AWS's security and compliance reports

A and C are correct. Customer trains user on use of AWS services

Keyword - Instance => C

Key word: 3 years. Amazon EC2 Reserved Instance is the most correct to answer.

A & C is correct.

Theoretically speaking for learning, Opex is seen as being reduced.

But in reality, it might not be the case depending on how you design and use it.

Answer is C:

Ref: https://docs.aws.amazon.com/whitepapers/latest/cost-management/getting-started-with-cost-management.html.

The AWS Cost and Usage Report gives you the most granular insight possible into your costs and usage, and it is the source of truth for the billing pipeline"