AZ-900 - Chapter 2: Cloud Concepts Quiz

b. As resource demand increases, Azure can split the demand over more resources and scale the resources. Scalability is a core benefit of cloud computing, and allows any application to add resources almost instantly as demand increases. Scalability is not working across regions, but rather within the same application.

How does scalability on Azure work? a. Scaling of resources on Azure is currently not possible. b. As resource demand increases, Azure can split the demand over more resources and scale the resources. c. If an account has more than one Azure region active, resources can be copied between these regions. d. Any Virtual Machine can quickly expand or decrease compute resources

b. Private Clouds can be hosted at your datacenter or hosted by a third-party service. Private Clouds offer advantages of flexibility, control, and scalability. In a Private Cloud, infrastructure and services exist on hardware and software dedicated to your organization. c. A hybrid cloud combines a public cloud (such as Azure) with on-premises infrastructure (private cloud). Microsoft defines Private Clouds as being able to be hosted at your datacenter or hosted by a third-party service. Microsoft considers Private Clouds as offering more flexibility, control, and scalability. Microsoft considers Private Clouds as always existing on hardware and software dedicated to your organization.

Select all the true statements per Microsoft's definitions of cloud types. Choose 2. a. In Private Clouds, your cloud infrastructure is isolated from other tenants of the Private Cloud. b. Private Clouds can be hosted at your datacenter or hosted by a third-party service. Private Clouds offer advantages of flexibility, control, and scalability. In a Private Cloud, infrastructure and services exist on hardware and software dedicated to your organization. c. A hybrid cloud combines a public cloud (such as Azure) with on-premises infrastructure (private cloud). d. Public Clouds generally cost more than private clouds, but are generally less reliable than on-premises infrastructure (private cloud).

c. Scaling up or down, and scaling out. Scaling up and down is making a resource, such as a VM, large or smaller. This is also known as "Scaling vertically". Scaling out is adding more resources of the same type, known as "Scaling horizontally".

What are the two types of scaling on Azure? a. There is only one type of scaling: scaling up/down. b. Scale Sets and High Availability c. Scaling up or down, and scaling out. d. Scaling out and scaling across.

d. Any data center physical infrastructure provided by Azure, such as servers and storage, that can be provisioned and managed over the Internet. Infrastructure as a service (IaaS) is an instant computing infrastructure, provisioned and managed over the Internet. A cloud computing service provider, such as Azure, manages the infrastructure, while you purchase, install, configure and manage your own software - operating systems, middleware and applications.

What does Infrastructure-as-a-Service describe? a. The layer of services that enable a complete cloud infrastructure for your business. b. Services on Azure that are updated automatically to provide a stable infrastructure for your applications. c. Any service on Azure that you can rent and don't have to buy upfront. d. Any data center physical infrastructure provided by Azure, such as servers and storage, that can be provisioned and managed over the Internet.

d. Ensure services and applications remain available in the event of a failure. Fault tolerance means that a failure can occur on Azure services and applications, but it will not affect its availability.

What does fault tolerance describe for cloud computing? a. A complete plan to recover critical business systems and normal operations, in case of a disaster. b. A system within Azure that uses cloud computing resources to mitigate faults quickly. c. The ability for multiple regions within Azure to "cover" each other in case of an outage. d. Ensure services and applications remain available in the event of a failure.

d. When all servers for a solution are abstracted away and managed by someone else. Serverless computing solutions provide a simple way to create manageable and scalable solutions at low costs. There is always a server somewhere to run your application, but you don't control it. Serverless is a kind of extreme PaaS.

What is "serverless" computing? a. An application that is running on the cloud platform without the use of servers. b. A simpler version of Platform-as-a-Service. c. A theory for making computing completely cloud-based for certain scenarios. d. When all servers for a solution are abstracted away and managed by someone else.

c. It enables companies to use a mix of on-premises and public cloud components. A hybrid cloud solution can offer the best of public cloud and on-premises services for many companies. A hybrid solution enables businesses to use a mix of on-premises infrastructure whilst scaling certain resources in the cloud.

What is a benefit of a hybrid cloud approach? a. Using alternative energy sources for powering some services can create tax benefits in some regions. b. All maintenance is handled by Microsoft Azure so it reduces support costs. c. It enables companies to use a mix of on-premises and public cloud components. d. It requires no changes to existing code or applications, allowing companies to scale their infrastructure into the cloud.

c. Consumption-based pricing is when you are charged for only what you use (Pay-As-You-Go rate). Consumption-based pricing is indeed when you are charged for only what you use (Pay-As-You-Go rate). Consumption-based pricing is not limited to free accounts and the services are not necessarily consumed all the time.

What is consumption-based pricing on Azure? a. Some core services on Azure are consumed constantly to keep your applications running. You pay for this consumption. b. Consumption based pricing is the model for paying for any services on a free Azure account. c. Consumption-based pricing is when you are charged for only what you use (Pay-As-You-Go rate). d. Any service you use on Azure has a consumption component as part of the pricing.

d. If one resource on Azure dies unexpectedly, another resource will almost instantly take over the workload. High availability is one of the core benefits of using cloud computing. It ensures that backup resources are ready to take over any workload.

What is high availability in cloud computing? a. High availability refers to the availability of the Azure Portal. You can always get access to an overview of what your Azure services are doing. b. Azure will provide an infinite number of resources to your application to make sure it always runs optimally. c. Microsoft guarantees you will always have access to the resources on Azure. d. If one resource on Azure dies unexpectedly, another resource will almost instantly take over the workload.

b. OPEX is an ongoing cost for running a business. CAPEX is the cost of acquiring and maintaining assets. Knowing the difference between OPEX and CAPEX is critical to get the best value out of Azure for your company. Capital Expenditures (CAPEX) generally result in the acquisition and maintenance of assets, such as server hardware. Operating Expenditures (OPEX) are the ongoing costs of running a business, such as paying for cloud services on a recurring basis. By moving costs to OPEX, businesses can plan for ongoing costs rather than large investments.

What is the difference between OPEX and CAPEX? a. OPEX is better return on investment in the short term. CAPEX is better return on investment in the long term. b. OPEX is an ongoing cost for running a business. CAPEX is the cost of acquiring and maintaining assets. c. OPEX is a cost on services you don't own, such as cloud computing. CAPEX is a cost of ownership. d. OPEX is costs for acquiring assets. CAPEX is an ongoing cost for running a business.

d. The ability to quickly expand or decrease computer processing, memory and storage resources. Elasticity is a core benefit of cloud computing and lets even small businesses take advantage of the cloud.

Which cloud ability does elasticity describe? a. Elasticity is the same as scalability and describes an increase in resources. b. The ability to turn resources on and off quickly across regions. c. The ability to create identical resources in multiple locations globally. d. The ability to quickly expand or decrease computer processing, memory and storage resources.

a. To enable the ability to rapidly develop, test and launch software applications that drive business growth. Cloud agility is tied to the rapid provisioning of computer resources. Cloud environments can usually provide new compute instances or storage in minutes, a far cry from the very common weeks (or months, in some organizations) the same provisioning process can take in typical IT shops.

Why is cloud agility important for businesses? a. To enable the ability to rapidly develop, test and launch software applications that drive business growth. b. To automatically improve the fidelity of resource usage and utilize the platform better. c. To be able to quickly scale resources when needed at short notice. d. To increase the return on investment from using cloud elasticity.