Domain 4: Refactoring

Question 1

What is CloudFront?

Answer 1

CloudFront is an AWS Content Delivery Network (CDN) which is a system of distributed servers geographically distributed to deliver data

Question 2

What is an edge location?

Answer 2

A location which stores file in a cache for fast delivery to end-users. Reducing both latency (edge location is closer to the user) and cost (user isn’t always reading from s3 and is reading from the cache instead)

Question 3

What is an “origin” in CloudFront?

Answer 3

The location where CloudFront gets content to serve users

Question 4

What are the six “R’s” in migration and refactoring?

Answer 4

Rehost - Lift and shift
Replatform - Lift, tinker and shift
Repurchase - Replace with a service
Refactor - Rearchitect application for the cloud
Retain - Retain the service as not being moved to the cloud
Retire - Get rid of the service as it is no longer needed

Question 5

What is Refactoring in migration?

Answer 5

Re-write application & re-architect a solution

Question 6

What is AWS Application Discovery Service?

Answer 6

AWS Application Discovery Service helps customers migrate projects to the cloud.
It collects & presents configuration, usage from your data centre.

Question 7

What is Re-host?

Answer 7

Move applications to cloud without any changes

Question 8

What is Re-platform?

Answer 8

Move applications to cloud with minor changes, e.g. using AWS RDS for databases

Question 9

What is Re-purchase?

Answer 9

Move perpetual licences to a software-as-a-service model.