AZ-900 Questions and Answers
In an IaaS model, what are the responsibilities of the customers according to the shared responsibility model?
Patching guest operating systems (ie., Windows 10), applications, and network controls
In which cloud service model can an organization offload its en...
AZ-900 Questions and Answers
In an IaaS model, what are the responsibilities of the customers according to the shared
responsibility model? - answer Patching guest operating systems (ie., Windows 10),
applications, and network controls
In which cloud service model can an organization offload its entire physical hardware
responsibilities, potentially allowing it to shut down its on-premises data center? -
answer Public cloud
Private cloud - answer Computing services offered either over the Internet or a
private internal network and only to select users instead of the general public. Can be
deployed on-premise or in a third-party hosted environment.
A company has distributed its workload on both the Azure Cloud and some on-premises
servers. What type of architecture is this? - answer Hybrid Cloud
Hybrid cloud - answer A type of cloud computing that combines on-premises
infrastructure—or a private cloud—with a public cloud.
What is high availability? - answer The ability of a system to remain operational to
users during downtime.
What are some examples of planned outages? - answer OS patches, application
updates, migrating to a new host provider, and hardware replacements
What are examples of unplanned outages? - answer Natural disasters, cyber
attacks, poor scaling/architecture design, network outages, bugs, hardware failures,
power outages
How are planned outages mitigated? - answer - Gradual deployments
- Deployment testing
- Easy rollbacks
- Smaller and more frequent deployments
- Automation
Ways to mitigated unplanned outages? - answer - Automation
- Different availability features, like cross-region load balancing
- strong security practices
- Testing increased traffic (load testing)
- Wide geographic distribution
- Constant health monitoring
,Scalability - answer Ability of a system to easily accommodate increased traffic or
demand by adding or removing features
Why scalability is needed - answer Lets businesses adapt to increased traffic or
usage without changing code or design
Examples of businesses that need scalability - answer E-commerce sites that see
spikes of traffic on Black Friday; universities that see increased traffic on the first day of
registration
Signs of a scalable network - answer If system capacity can be expanded easily
without it being a massive undertaking.
Vertical scaling - answer "Up or down" scaling, such as making a server more
powerful by adding more resources, CPU, memory, etc.
Downside of vertical scaling - answer - There is ultimately a limit before you reach
max capacity
- Does not necessarily increase availability
Service layers - answer Application and Data
OS and runtime
Hypervisor (VM)
Network
Compute
Storage
Service layers most important to company - answer Applications and data. Azure
would be responsible for storage, network, compute, and hypervisor
What would customers be responsible for in an IaaS like a VM? - answer Anything
from the operating system and above (OS, applications and data)
____ is the most flexible cloud service type - answer IaaS
for ___ services, you don't have full access to the operating systems or runtimes
underlying those services, though you can still pick specific operating systems and
configurations - answer PaaS
Generally, what do companies want to avoid when using cloud services? - answer
Companies generally want to take on less responsibility for anything other than
applications and data and focus on delivering the full business value for the customer
What are serverless services? - answer Event-driven services. You pay for the work
that is done (CPU cycles).
______ generally deliver the most business value for the end user - answer SaaS
________ cloud model allows you maintain control of the cloud with your own
management infrastructure - answer private
Which cloud model is considered a capital expenditure? - answer private cloud
because CapEx because you're buying and running your own servers
True or False: Azure has the ability to extend and enable services to the private cloud. -
answer True
If a company operating its own on-premise datacenters was interested in accessing
certain tools and resources from the public cloud, which cloud model could they use? -
answer Hybrid cloud
A company is interested in migrating a web service to Azure but would like to minimize
their responsibility for any underlying architecture. Which cloud model should they use?
- answer a PaaS such as Azure App Services
If a company needs auto-scale capabilities and larger-scale deployments for their
containers, which cloud service should they use? - answer a PaaS such as Azure
Kubernetes Services (AKS)
If a company needs an action to be executed when queue or a file is written to a storage
account, which type of Azure service should they use? Which specific service can be
used? - answer a serverless offering such as Functions
Let's say you'd like to create a program consisting a series of steps for a common
problem but don't want to write down excessive code. Which specific Azure service
could you use? - answer a serverless offering such as Azure Logic Apps
If a company running a cloud service is interested in using the public cloud but but
wants to run certain workloads on the edge (closer to their own data center), which
cloud model could be used? - answer hybrid cloud
Which kind of cloud service should be used as often as possible in order to have your
company's business function delivered as efficiently as possible? - answer SaaS
Which cloud service should a company have if they want direct access and control of an
operating system? - answer IaaS
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