Cloud Concepts (25-30%)

Question 1

Cloud Computing

Answer 1

The ability to rent computing services of all types (compute, storage, networking, database, machine learning, etc.)

Question 2

Public Cloud

Answer 2

cloud services provided over the public facing internet to anyone who wants to sign up for them. Azure owns the hardware, you rent it from them.

Question 3

Private Cloud

Answer 3

• Cloud services offered only to select users.
• Sometimes called internal cloud
• Looks and acts like cloud computing, but uses resources and servers available only to your company/organization.

Question 4

Hyrbid Cloud

Answer 4

a mixture between your own private network/servers, and using the public cloud for some things.

Question 5

Capital Expenditure (CapEx)

Answer 5

a large amount of money invested in an asset spent up front, and it returns profit slowly over time.

Question 6

Operating Expenditure (OpEx)

Answer 6

an amount of money spent every month as an operating expense; hopefully you earn more money in revenue from it than you spend.

Question 7

Consumption Based Model

Answer 7

paying for something based on how much you used as opped to paying for something no matter if you use it or not.

Question 8

Cloud Pricing models

Answer 8

• Free Services
• Pay for Time
• Pay per GB
• Pay for Operations
• Pay per execution

Question 9

Availability

Answer 9

what percentage of time does a system respond to request, expressed as a percentage

Question 10

High Availability

Answer 10

a system specifically designed to be resilient when some component of the system fails

Question 11

Scalability

Answer 11

the ability of a system to grow its capacity “easily” when a system reaches its max capacity

Question 12

Vertical Scaling

Answer 12

keeping the same number of resources but giving them more capacity

Question 13

Horizontal Scaling

Answer 13

increasing or decreasing the number of resource instances

Question 14

Reliability

Answer 14

resiliency and availability, to restore the systems and applications after a failure occurs and provide consistent access to the systems and applciations

Question 15

Disaster Recovery

Answer 15

the ability to recover from a big failure within an acceptable period with an acceptable amount of data lost

Question 16

Predictability

Answer 16

performance predictability or cost predictability

Question 17

Security

Answer 17

to protect applications and data from threats

Question 18

Governance

Answer 18

the policies and procedures of your company that protect your account and your data

Question 19

Elasticity

Answer 19

the ability of a system to automatically grow when max capacity is reached and shrink to minimize waste

Question 20

Agility

Answer 20

the ability to respond to change “rapidly” based on changes to market or environment

Question 21

Managment in the Cloud

Answer 21

to manage cloud environment and resources via web portal, CLI, API or Powershell

Question 22

Infrastructure as a Service (IaaS)

Answer 22

this is the computing paradigm where Azure provides you the virtual hardware and you can have complete control over that.
- (VM, Load balancer, application gateway, virtual network)

Question 23

Platform as a Service (PaaS)

Answer 23

you lose some control over the hardware, generally you upload your own code and just configure the environment in Azure to run it.
- (App Services, Web Apps, SQL Database)

Question 24

Serverless Compute

Answer 24

Removes both the need to manage the infrastructure and the need to configure the environment that runs your code.

Question 25

Software as a Service (SaaS)

Answer 25

you lose even more control over the hardware and the software, Azure will provide you an application that they developed, and you just configure it to your usage.