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Study for Microsoft Azure AZ-900 Certification Exam
What is Microsoft Azure?
A cloud computing platform with an ever-expanding set of services to help customers to build solutions to meet their business goals
What kind of services is supported or provided by Azure?
It has simple web services for hosting customer business presence in the cloud
It supports running fully virtualized computers managing customer custom software solutions
It provides a wealth of cloud-based services like remote storage, database hosting, and centralized account management
It offers new capabilities like artificial intelligence (AI) and Internet of Things (IoT) focused services
What is cloud computing?
The delivery of computing services over the internet, that includes common IT infrastructure such as virtual machines, storage, databases, and networking, and also expand the traditional IT offerings to include things like Internet of Things (IoT), machine learning (ML), and artificial intelligence (AI)
What is the biggest advantages of cloud computing over traditional datacenters?
It uses the internet to deliver services
It doesn’t have to be constrained by physical infrastructure
If the customer needs to increase its IT infrastructure rapidly, it can use the cloud to rapidly expand its IT footprint
When we have a traditional on-premises datacenter, the company is responsible for everything: maintaining the physical space, ensuring security, maintaining or replacing the servers if anything happens, maintaining all the infrastructure and software needed to keep the datacenter up and running, and keeping all systems patched and on the correct version. Is it correct to say that, with cloud computing, those things are all responsibility of the cloud provider?
No. When using cloud computing, we use a shared responsibility model that distributes the responsibilities between the cloud provider and the consumer. Information and data, devices, and accounts and identities are always responsibility of the consumer. Physical hosts, physical network, and physical datacenter are always responsibility of the cloud provider. With identity and directory infrastructure, applications, network controls, and operating systems the responsibility varies according to service types, that can be Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
In IaaS, which of the following topics are responsibility of the cloud provider, which are responsibility of the consumer, and which are shared responsibility between them?
- identity and directory infrastructure
- applications
- network controls
- operating systems
In IaaS, all those things are responsibility of the consumer. IaaS places the most responsibility on the consumer, with the cloud provider being responsible for the basics of physical security, power, and connectivity.
In SaaS, which of the following topics are responsibility of the cloud provider, which are responsibility of the consumer, and which are shared responsibility between them?
- identity and directory infrastructure
- applications
- network controls
- operating systems
In SaaS, the responsibility for identity and directory infrastructure is shared between the consumer and the cloud provider. Applications, network controls, and operating systems are responsibility of the cloud provider. SaaS places most of the responsibility with the cloud provider.
In PaaS, which of the following topics are responsibility of the cloud provider, which are responsibility of the consumer, and which are shared responsibility between them?
- identity and directory infrastructure
- applications
- network controls
- operating systems
In PaaS, identity and directory infrastructure, applications, and network controls the responsibility is shared between the consumer and the cloud provider. The operating system is responsibility of the cloud provider. PaaS is a middle ground between IaaS and SaaS.
What are the best and the worst things about a private cloud compared to a public cloud?
The best thing is that with a private cloud, the company and its IT department have much greater control. The worst is that it comes with greater cost and fewer of the benefits of a public cloud deployment.
Is it correct to say that the only way that a private cloud may be hosted is from your on site datacenter?
No. It may also be hosted offsite by a third party that has a dedicated datacenter to the consumer.
What are public clouds?
Public clouds are built, controlled, and maintened by a third-party cloud provider that offers cloud services and resources for anyone that wants to purchase that.
What is and when to use a hybrid cloud?
A hybrid cloud is a computing environment that inter-connects public and private clouds. It is used when the users need to choose which services to keep in public cloud and which to deploy to their private cloud infrastructure, usually to obtain an extra layer of security or to allow a private cloud to surge for increased, temporary demand by deploying public cloud resources.
What is Azure Arc?
It is a set of technologies that helps the customer to manage its cloud environment, that can be a public cloud on Azure, a private cloud, a hybrid configuration or a multi-cloud environment with multiple cloud providers.
What is Azure VMware Solution?
It is a solution that lets the customer migrate its established VMware workloads in private cloud environment to a public or hybrid cloud with seamless integration and scalability.
When we consider the two types of expenses on IT infrastructure models, capital expenditure (CapEx) and operational expenditure (OpEx), in which of them cloud computing falls under?
Cloud computing operates on a consumption-based model, there is no need to purchase or construct anything, so there is no CapEx. With cloud computing, the consumer only pays for the IT resources that it uses, so the expenses are all of OpEx type.
