Hybrid because Azure is already a public cloud example and it queries an on premise SQL server . So (public + private = hybrid).

Box 1:

Fault tolerance is the ability of a service to remain available after a failure of one of the components of the service. For example, a service running on multiple servers can withstand the failure of one of the servers.

Box 2:

Disaster recovery is the recovery of a service after a failure. For example, restoring a virtual machine from backup after a virtual machine failure.

Box 3:

Dynamic scalability is the ability for compute resources to be added to a service when the service is under heavy load. For example, in a virtual machine scale set, additional instances of the virtual machine are added when the existing virtual machines are under heavy load.

Box 4:

Latency is the time a service to respond to requests. For example, the time it takes for a web page to be returned from a web server. Low latency means low response time which means a quicker response.

Answer is YYN

Hybrid cloud: This computing environment combines a public cloud and a private cloud by allowing data and applications to be shared between them.

https://docs.microsoft.com/en-us/learn/modules/intro-to-azure-fundamentals/what-is-cloud-computing

1) PaaS doesn't support OS related controls to host the applications. => NO

2) Scale up: Get more CPU, memory, disk space, and extra features like dedicated virtual machines (VMs), custom domains and certificates, staging slots, autoscaling, and more. You scale up by changing the pricing tier of the App Service plan that your app belongs to. => YES

3) Scale out: Increase the number of VM instances that run your app. You can scale out to as many as 30 instances, depending on your pricing tier. App Service Environments in Isolated tier further increases your scale-out count to 100 instances. For more information about scaling out, see Scale instance count manually or automatically. There, you find out how to use autoscaling, which is to scale instance count automatically based on predefined rules and schedules. => YES

https://docs.microsoft.com/en-us/azure/app-service/manage-scale-up

Azure virtual machines run on Hyper-V physical servers. The physical servers are owned and managed by Microsoft. As an Azure customer, you have no access to the physical servers. Microsoft manage the replacement of failed server hardware and the security of the physical servers so you don't need to.

Incorrect Answers:

B: Microsoft have no control over the applications you run on the virtual machines. Therefore, it is your responsibility to ensure that application data is backed up.

D: Microsoft do not manage the operating systems you run on the virtual machines. Therefore, it is your responsibility to ensure that the operating systems are updated.

E: Microsoft have no control over the shared folders you host on the virtual machines. Therefore, it is your responsibility to ensure that folder permissions are configured appropriately.

NO

NO - Paying electricity is OpEx but Paying electricity for Datacenter (company own) is CapEx.

YES

Azure "Virtual Machine" is an example of "Infra as a Service".

We deploy only in private data centers. It comes under private cloud model and hybrid cloud models. So, the correct answer is A.

Virtual Machines are an example of IaaS (Infrastructure as a Service). As when you launch a Virtual machine you only configure and manage the hardware for your machine.

=> B is correct.

Answer A is correct. Virtual Machines are an example of IaaS.