Microsoft Azure Fundamentals Exam Ref
AZ-900 Questions & Answers 2023/2024
Describe the benefits and considerations of using Cloud Services - ANSWER-High Availability
Scalability & Elasticity
Agility
Fault Tolerance & DR
Principles of Economies of Scale
Differences between CapEx and OpEx
Consumption-based Model
Why might you lose availability? - ANSWER-Network Outage
Application Failure
System Outage (VM)
Power Outage
Problem with Reliant System (external database)
Cloud providers offer a service-level agreement that guarantees what? - ANSWER-A certain level of
availability as a percentage
An SLA will usually guarantee an uptime close to 100%, but it only covers what? - ANSWER-Systems that
are controlled by the Cloud Provider
All applications require some level of _____ connectivity - ANSWER-Network
Users of an application require _____ connectivity to the _____ - ANSWER-Network
PCs
Applications require connectivity to the _____ such as _____ - ANSWER-Back-end systems
,database servers
Applications may also call into other _____ using a _____ - ANSWER-Applications
Network
By moving to the cloud you gain the benefit of the cloud providers _____ and additional _____ that
comes with it - ANSWER-Infrastructure
Reliability
What are some causes of an application failure? - ANSWER-Software bug, but also can be application
design
In some cloud scenarios, you are responsible for application failures. Y/N - ANSWER-Yes, but your cloud
provider likely has tools to diagnose the failure
Which Azure service integrates with your application to give detailed information about the performance
and reliability of your application? - ANSWER-Application Insights
How does a system outage occur? - ANSWER-When the computer running a particular system becomes
unavailable
What makes it easy to add additional computers when necessary? - ANSWER-VMs
Depending on the cloud service you choose, you may or may not be responsible for maintaining your
VMs. Y/N - ANSWER-Yes
Is the Cloud Provider able to monitor the health of VMs and recover an unhealthy VM? - ANSWER-Yes
What is critical to availability? - ANSWER-Reliable electricity
,What do Cloud Providers utilize in order to prevent availability problems due to power outages? -
ANSWER-Battery-Operated power backup and other redundant systems
Are Cloud Providers able to run your application from another region that isn't impacted? - ANSWER-Yes
What are some benefits to hosting your application in the cloud? - ANSWER-Troubleshooting, alerting,
and diagnosis tools provided by the Cloud Provider
What is the best way to minimize cost? - ANSWER-Only using the resources necessary for your purpose
What is Scaling? - ANSWER-Adding additional resources or additional power for your application
What is horizontal scaling? - ANSWER-Adding additional VMs for your application
What is vertical scaling? - ANSWER-Moving to a new VM with additional resources
What is the concept of automatic scaling? - ANSWER-Elasticity
Name the Azure service that can automatically scale applications based on usage patterns, resource
utilization, time of day, etc. - ANSWER-Auto-Scale
What is Cloud Agility? - ANSWER-The ability to quickly scale
What is Fault Tolerance? - ANSWER-Automatically move you from an unhealthy system onto a healthy
system
What is Disaster Recovery? - ANSWER-Replicating your application's resources to an unaffected region,
as well as having reliable backups
In an On-Premises model, is physical computer hardware used for IT needs considered CapEx or OpEx? -
ANSWER-Capital Expenditure
, Why might you not want to choose the on-premises model? - ANSWER-Hardware becomes outdated and
isn't agile
In a Cloud Model, why are IT costs moved from CapEx to OpEx? - ANSWER-You're basically renting the
hardware
Explain the principle of economies of scale. - ANSWER-Cloud provider purchases such a large scale of
resources that the price is reduced and thus savings are passed on to consumers of the cloud
What is a consumption-based model? - ANSWER-The ability to use only those computing resources you
require at any particular time
Are you able to only pay for the time you consume computer resources? - ANSWER-Yes
What should you balance when evaluating your use of the cloud? - ANSWER-The need for controlling
resources against the convenience of allowing the cloud provider to handle it
As a cloud consumer, in which scenario do you have the most control? The least control? IaaS, PaaS, SaaS
- ANSWER-PaaS
SaaS
What is the Cloud Provider responsible for in an IaaS offering? - ANSWER-Providing the VM
What are you responsible for in an IaaS offering? - ANSWER-Installing the OS, handling patches with
security updates, and troublshooting
Which scenario do you usually have remote access to your VMs? - ANSWER-IaaS, if you move to PaaS or
SaaS you usually lose this ability as the infrastructure is managed by the cloud provider
What are some Azure Services that become available when you have an IaaS VM running in Azure? -
ANSWER-Azure Security Center - security
AZ-900 Questions & Answers 2023/2024
Describe the benefits and considerations of using Cloud Services - ANSWER-High Availability
Scalability & Elasticity
Agility
Fault Tolerance & DR
Principles of Economies of Scale
Differences between CapEx and OpEx
Consumption-based Model
Why might you lose availability? - ANSWER-Network Outage
Application Failure
System Outage (VM)
Power Outage
Problem with Reliant System (external database)
Cloud providers offer a service-level agreement that guarantees what? - ANSWER-A certain level of
availability as a percentage
An SLA will usually guarantee an uptime close to 100%, but it only covers what? - ANSWER-Systems that
are controlled by the Cloud Provider
All applications require some level of _____ connectivity - ANSWER-Network
Users of an application require _____ connectivity to the _____ - ANSWER-Network
PCs
Applications require connectivity to the _____ such as _____ - ANSWER-Back-end systems
,database servers
Applications may also call into other _____ using a _____ - ANSWER-Applications
Network
By moving to the cloud you gain the benefit of the cloud providers _____ and additional _____ that
comes with it - ANSWER-Infrastructure
Reliability
What are some causes of an application failure? - ANSWER-Software bug, but also can be application
design
In some cloud scenarios, you are responsible for application failures. Y/N - ANSWER-Yes, but your cloud
provider likely has tools to diagnose the failure
Which Azure service integrates with your application to give detailed information about the performance
and reliability of your application? - ANSWER-Application Insights
How does a system outage occur? - ANSWER-When the computer running a particular system becomes
unavailable
What makes it easy to add additional computers when necessary? - ANSWER-VMs
Depending on the cloud service you choose, you may or may not be responsible for maintaining your
VMs. Y/N - ANSWER-Yes
Is the Cloud Provider able to monitor the health of VMs and recover an unhealthy VM? - ANSWER-Yes
What is critical to availability? - ANSWER-Reliable electricity
,What do Cloud Providers utilize in order to prevent availability problems due to power outages? -
ANSWER-Battery-Operated power backup and other redundant systems
Are Cloud Providers able to run your application from another region that isn't impacted? - ANSWER-Yes
What are some benefits to hosting your application in the cloud? - ANSWER-Troubleshooting, alerting,
and diagnosis tools provided by the Cloud Provider
What is the best way to minimize cost? - ANSWER-Only using the resources necessary for your purpose
What is Scaling? - ANSWER-Adding additional resources or additional power for your application
What is horizontal scaling? - ANSWER-Adding additional VMs for your application
What is vertical scaling? - ANSWER-Moving to a new VM with additional resources
What is the concept of automatic scaling? - ANSWER-Elasticity
Name the Azure service that can automatically scale applications based on usage patterns, resource
utilization, time of day, etc. - ANSWER-Auto-Scale
What is Cloud Agility? - ANSWER-The ability to quickly scale
What is Fault Tolerance? - ANSWER-Automatically move you from an unhealthy system onto a healthy
system
What is Disaster Recovery? - ANSWER-Replicating your application's resources to an unaffected region,
as well as having reliable backups
In an On-Premises model, is physical computer hardware used for IT needs considered CapEx or OpEx? -
ANSWER-Capital Expenditure
, Why might you not want to choose the on-premises model? - ANSWER-Hardware becomes outdated and
isn't agile
In a Cloud Model, why are IT costs moved from CapEx to OpEx? - ANSWER-You're basically renting the
hardware
Explain the principle of economies of scale. - ANSWER-Cloud provider purchases such a large scale of
resources that the price is reduced and thus savings are passed on to consumers of the cloud
What is a consumption-based model? - ANSWER-The ability to use only those computing resources you
require at any particular time
Are you able to only pay for the time you consume computer resources? - ANSWER-Yes
What should you balance when evaluating your use of the cloud? - ANSWER-The need for controlling
resources against the convenience of allowing the cloud provider to handle it
As a cloud consumer, in which scenario do you have the most control? The least control? IaaS, PaaS, SaaS
- ANSWER-PaaS
SaaS
What is the Cloud Provider responsible for in an IaaS offering? - ANSWER-Providing the VM
What are you responsible for in an IaaS offering? - ANSWER-Installing the OS, handling patches with
security updates, and troublshooting
Which scenario do you usually have remote access to your VMs? - ANSWER-IaaS, if you move to PaaS or
SaaS you usually lose this ability as the infrastructure is managed by the cloud provider
What are some Azure Services that become available when you have an IaaS VM running in Azure? -
ANSWER-Azure Security Center - security
