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AZ-900 Questions

Q1. Mark correct answers.

  • Azure provides flexibility between capital expenditure (CapEx) and operational expenditure (OpEx).

  • If you create two azure virtual machines that use the B2S size, each virtual mach(oe will always generate the same monthly costs.

  • When an Azure Virtual machine is stopped, you continue to pay storage costs associated to the virtual machine.

Correct Answers

  • ✅ Azure provides flexibility between capital expenditure (CapEx) and operational expenditure (OpEx)
  • ✅ When an Azure Virtual machine is stopped, you continue to pay storage costs associated to the virtual machine.

Explanation: If you are using HDD or SSD storage even after your virtual machine is stopped and the hard disk/SSD space cannot be used by any one else until you delete the VM completely. so If you are deleting the VM then no additional cost needs to be paid, but if VM is stopped but not deleted then storage cost needs to be paid.

AZ-900 Episode 01 - Practice Test

Question 1

Cloud computing is a delivery model for what four service types?

Describe Cloud Concepts

Question 1

Statements

Q1. A platform as a service (PaaS) solution that hosts web apps in Azure provides full control of the operating systems that host applications.

Show Answer

No

Q2. A platform as a service (PaaS) solution that hosts web apps in Azure provides the ability to scale the platform automatically.

Show Answer

Yes

Q3. A platform as a service (PaaS) solution that hosts web apps in Azure provides professional development services to continuously add features to custom applications.

Show Answer

Yes

Explanation:

Box 1: No - A PaaS solution does not provide access to the operating system. The Azure Web Apps service provides an environment for you to host your web applications. Behind the scenes, the web apps are hosted on virtual machines running IIS. However, you have no direct access to the virtual machine, the operating system or IIS.

Box 2: Yes - A PaaS solution that hosts web apps in Azure does provide the ability to scale the platform automatically. This is known as autoscaling. Behind the scenes, the web apps are hosted on virtual machines running IIS. Autoscaling means adding more load balanced virtual machines to host the web apps.

Box 3: Yes - PaaS provides a framework that developers can build upon to develop or customize cloud-based applications. PaaS development tools can cut the time it takes to code new apps with pre-coded application components built into the platform, such as workflow, directory services, security features, search and so on. References: https://azure.microsoft.com/en-gb/overview/what-is-paas/

Question 2

Statements

Q1. Azure provides flexibility between capital expenditure (CapEx) and operational exponditure (OpEx).

Show Answer

Yes

Q2. If you create two Azure virtual machines that use the B2S size, each virtual machine will always generate the same monthly costs.

Show Answer

No

Q3. When an Azure virtual machine is stopped, you continue to pay storage costs associated to the virtual machine.

Show Answer

Yes

Explanation:

Box 1: Yes - Traditionally, IT expenses have been considered a Capital Expenditure (CapEx). Today, with the move to the cloud and the pay-as-you-go model, organizations have the ability to stretch their budgets and are shifting their IT CapEx costs to Operating Expenditures (OpEx) instead. This flexibility, in accounting terms, is now an option due to the ג€as a Serviceג€ model of purchasing software, cloud storage and other IT related resources.

Box 2: No - Two virtual machines using the same size could have different disk configurations. Therefore, the monthly costs could be different.

Box 3: Yes - When an Azure virtual machine is stopped, you donג€™t pay for the virtual machine. However, you do still pay for the storage costs associated to the virtual machine. The most common storage costs are for the disks attached to the virtual machines. There are also other storage costs associated with a virtual machine such as storage for diagnostic data and virtual machine backups. References: https://meritsolutions.com/capex-vs-opex-cloud-computing-blog/

Question 3

When you are implementing a Software as a Service (SaaS) solution, you are responsible for

  • configuring high availability.
  • defining scalability rules.
  • installing the SaaS solution.
  • configuring the SaaS solutlon.
Show Answer

configuring the SaaS solutlon.

Question 4

You have an on-premises network that contains several servers. You plan to migrate all the servers to Azure. You need to recommend a solution to ensure that some of the servers are available if a single Azure data center goes offline for an extended period. What should you include in the recommendation? A. fault tolerance B. elasticity C. scalability D. low latency

Show Answer

A. fault tolerance

Explanation:

Fault tolerance is the ability of a system to continue to function in the event of a failure of some of its components. In this question, you could have servers that are replicated across datacenters. Availability zones expand the level of control you have to maintain the availability of the applications and data on your VMs. Availability Zones are unique physical locations within an Azure region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking. To ensure resiliency, there are a minimum of three separate zones in all enabled regions. The physical separation of Availability Zones within a region protects applications and data from datacenter failures. With Availability Zones, Azure offers industry best 99.99% VM uptime SLA. By architecting your solutions to use replicated VMs in zones, you can protect your applications and data from the loss of a datacenter. If one zone is compromised, then replicated apps and data are instantly available in another zone. References: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/manage-availability

Banke Notes

Banke Notes: Fault-tolernce. When there is only one data center then Fault domain is assigned in different racks of same data center. when there are multiple availability zones then Fault domains can be kept in multiple availaibility zones. so Fault tolerance protect from local hardware failure in one rack or for entire data center. let say entire data center is failed then Fault domain in another AZ will we used to keep system up and running.