Azure Fundamentals (AZ900) certification preparation – short notes-I

Azure certifications are of high industry demand right now and Azure Fundamentals (AZ-900) is the right starting point for the certifications. You can see here how you can get a free Azure training and an exam voucher you can use for the certification.

In these series of posts, we are sharing a certification preparation notes for you. Instead of going thru the detailed content over internet, you can refer these short notes in your exam preparation.

[ Disclaimer : This is not a complete training material for the certification. This is just random (short) notes which we captured from course curricula, which will help the readers for their final revision/rewind before appearing for the exam. We do not offer any guarantee in passing the exam with this content ]

We recommend referring to the Microsoft Docs page for the detailed notes.

Types of compute

Virtual machines : Emulating a computer system without having dedicated hardware. It can run the guest operating system on shared hardware. Consumers can deploy multiple virtual machines on the physical hardware as they need (depending on the hardware limitation also).
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containers : containers serves the execution environments for applications without a guest operating system. A container will have the application and all the dependencies packaged in it. example : Docker
serverless computing : Lets you to build and run applications without worrying about the underlying server/host.Cloud provider runs the server for you.
Cloud computing benefits
Cost-effective : Consumer doesn’t have to pay for and maintain the hardware and infrastructure for their needs. Cloud provider allows a pay-as-you-go pricing.
Scalable : Lets the consumer scale their environment (both scaling up and scaling out) as per the demand
Elastic : Based on the needs, the cloud can automatically allocate more resources and can be de-allocated automatically once the requirement is completed.
Global : You can provision your resources in any region across the globe, totally redundant.
Reliable : reliability via redundancy, backups and disaster recovery solutions all inbuilt.
Secure : Physical (to the physical infrastrucure) and digital (relevent authentication for data access) security assured.
CapEx and OpEx
CapEx : all the expenditures in (initially) setting up the environment. Upfront expense.
examples include the Server, Storage, Networking, DataCenter infrastructure and Technical resources expense etc…
Benefits : Fixed expense and consumer can plan the budget.
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OpEx : With Cloud Computing the consumers has to worry about on the operation expenses (the billing for the infra and services) which involves limited upfront payment.
Benefits : You do not have to pay full amount upfront.
Cloud deployment models
Private Cloud : Cloud environment within your data center. Complete control on the hardware/physical infrastructure and the physical security.
Public Cloud : Hardware is being managed completely by the cloud provider and the consumers use the required infra and services.
Hybrid Cloud : A combined model of private and public cloud models, adding the benefits of both the models to the consumer.
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Types of cloud services
IaaS (Infrastructure as a Service) : A computing infrastructure for the consumer without having hardware with them. Consumer has the maximum control of the infra in this model compared to the other services.
PaaS (Platform as a Service) – For running/testing an application on the required platform without worrying about the infrastructure.
SaaS (Software as a Service) – Consumer can avail the software services from cloud without being concerned about the infra and the platform running it. Office365 is an example.

Hope this section will help you in your certification journey. You can find the next section in this series here. For the complete series click here.

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