Cloud Concepts

Question 1

What type of systems are able to withstand failure of one or more components?

Answer 1

Highly available systems

Question 2

How can a company increase availability when deploying an application?

Answer 2

Multi-Region deployment and multi-Availability Zone deployment

Question 3

Which AWS services could be used to build a serverless architecture?

Answer 3

S3
DynamoDB
Fargate
Lambda

Question 4

What is a geographical area of the world that is a collection of logically grouped data centres?

Answer 4

Region

Question 5

If you notice the traffic to a web application far exceeds what was expected, and you decide to move to a larger instance type, what AWS principle is being represented?

Answer 5

Vertical scaling

Question 6

What is the difference between horizontal and vertical scaling?

Answer 6

Horizontal - change the number of nodes in a computing system without changing the size of any individual node i.e. add instances

Vertical - increase the size and computing power of a single instance/node but don’t increase the number of nodes/instances

Question 7

Which benefit of cloud computing is demonstrated by provisioning a new EC2 instance at the click of a button, reducing the time to make resources available from weeks to minutes?

Answer 7

Increased speed and agility.

Question 8

Which service allows you to re-route traffic from EC2 instances to instances in another Region during disaster recovery exercises?

Answer 8

Route 53 can shift traffic to the new region.

Routes end users to internet applications by translating names into IP addresses.

Question 9

What is Amazon CloudFront?

Answer 9

A fast content delivery network service securely delivering data, videos, applications, and APIs to customers globally, with low latency, high transfer speeds, in a developer-friendly environment.

Question 10

Which service can help a company with no technical skills deploy in AWS?

Answer 10

AWS Partner Network (APN) Consulting Partners.

Engage a Consulting Partner to help deploy a new system to the cloud.

Question 11

What is AWS Partner Network (APN) Consulting Partners?

Answer 11

Useful to deploy to AWS, not build solutions.

Includes professional services organisations like:
* system integrators
* strategic consultancies
* agencies
* managed service providers
* value-added resellers

Question 12

What is AWS Partner Network (APN) Technology Partners

Answer 12

Provides new solutions to build on AWS, not to deploy to AWS.

Includes specific software, hardware, or connectivity services.

Question 13

What is the speed difference between Amazon Aurora and MySQL RDS?

Answer 13

Amazon Aurora is up to 5 times faster than MySQL RDS

Question 14

What are three advantages of an RDS database over a traditional database?

Answer 14

AWS maintains the underlying OS and performs software patching on the database.

Automated backups.

Allows customers to focus on their applications.

Question 15

What are the 3 cloud deployment models?

Answer 15

Public cloud
Private cloud
Hybrid cloud

Question 16

Which concept is used to measure a system’s ability to grow to accommodate an increase in demand?

Answer 16

Scalability.

Question 17

What does scalability mean?

Answer 17

Systems can adapt to meet new levels of demand. Horizontal vs vertical.

Question 18

What does elasticity mean?

Answer 18

The ability to acquire resources as you need them and release them when you don’t. Should be automatic in the cloud.

Question 19

When you pay a subscription fee to a hosting company to serve your website on an instance you manage, which cloud computing model are you using?

Answer 19

Infrastructure as a Service (IaaS)

Question 20

What is IaaS?

Answer 20

Infrastructure as a Service.

Offers building blocks that can be rented. Whenever you pay a web hosting fee, you’re using IaaS.

Question 21

What is PaaS?

Answer 21

Platform as a Service.

Enables the development, running, and management of applications on the cloud without needing to build and maintain infrastructure.

Often used by developers to develop software using web-based tools

Question 22

What are disposable resources?

Answer 22

Use as many resources as you need and dispose of them when you no longer need them

Question 23

What are temporary resources?

Answer 23

Use as many resources as you need and dispose of them when you no longer need them

Question 24

What are dedicated resources?

Answer 24

They allow customers to run on hardware dedicated to a single customer

Question 25

Who is responsible for EC2 instance application configuration?

Answer 25

You

Question 26

Who is responsible for awareness and training?

Answer 26

AWS and you

Question 27

What are the characteristics of Availability Zones?

Answer 27

One or more physically separated data centres.

They contain redundant:
Power
Networking
Connectivity

Housed in separate facilities

Question 28

What is the difference between the characteristics of AZs and Regions?

Answer 28

AZs are connected in a Region through low-latency links.

Regions are fully independent and isolated.

Question 29

Can a highly available solution experience downtime?

Answer 29

Yes, it just has high uptime percentage

Question 30

What does Direct Connect do?

Answer 30

Connects your on-premises data centre (private cloud) to AWS (public cloud)

Question 31

What is the difference between scalability and elasticity?

Answer 31

Scalability describes a measurement of a system’s ability to grow to accommodate increase in demand.

Elasticity describes an ability to acquire resources as you need them and release resources when you don’t need them.

Question 32

Which concept describes the ability to stop or terminate instances when not in use?

Answer 32

Elasticity

Question 33

Are cloud charges CapEx or OpEx?

Answer 33

OpEx