Cloud Concepts

Question 1

What is high availability?

Answer 1

• if hardware fails, replaced instantly
• Use clusters to ensure high availability
• Doesn’t guarantee zero downtime

Question 2

What is fault tolerance?

Answer 2

• Resilience

* Zero down-time

Question 3

What is disaster recovery?

Answer 3

• Complete plan to recover critical business systems
• Designated Time to Recovery (how long does it take to recover?)
• Recovery Point (point of time data to recover)

Question 4

What are the two features of scalability?

Answer 4

Scaling out and scaling up

Question 5

What is elasticity?

Answer 5

ability to quickly expand or decrease computing resources, not just VMs. Elasticity enables scaling

Question 6

What is agility?

Answer 6

the ability to rapidly develop, test and launch software applications that drive business growth

Question 7

What is capital expenditure

Answer 7

buying hardware outright, paid upfront as a one-time purchase

Question 8

What is operation expenditure

Answer 8

Pay as you go, ongoing cost to run business.

Question 9

IaaS?

Answer 9

the pysical hardware and infrastructure only

Question 10

PaaS

Answer 10

physical hardware and tools/ middleware

Question 11

SaaS

Answer 11

physical hardware, tools/middleware and applications

Question 12

What is the Azure Market Place

Answer 12

• Azure app store.

* Large selection from MS and partners – Apps, VMs, templates etc.

Question 13

What are the 3 cloud architectures

Answer 13

public, private, hybrid

Question 14

public

Answer 14

• Azure, AWS etc

* No upfront costs but monthly usage

Question 15

private

Answer 15

• Azure but on your own hardware

* All benefits of public cloud but can lock it down

Question 16

hybrid

Answer 16

• Best of both public and private

* Complex solution