B.2.4 CompTIA A+ 220-1101 (Core 1) Domain 4: Virtualization and Cloud Computing

Which term refers to a software implementation of a computer system that executes programs like a physical machine?

Virtual machine Explanation A virtual machine is a software implementation of a computer system that executes programs like a physical machine. A virtual machine functions as a self-contained and autonomous system.

Which of the following accurately describe a Type 2 hypervisor? (Select two.)

Acts as a software application. Can run on any OS. Explanation A Type 2 hypervisor acts as a software application. It is run on any OS and can run several operating systems on virtual machines. A Type 1 hypervisor acts as an OS on a physical host machine. A Type 2 hypervisor does not manage access to software programs on the host. Integration services (IS) dramatically improves the performance of a Windows virtual machine.

Which of the following accurately describes a hypervisor? (Select two.)

Allows virtual machines to interact directly with the hardware. A layer of software that resides between the virtual operating system and the hardware. Explanation A hypervisor is a thin layer of software that resides between the virtual operating system and the hardware. A hypervisor allows virtual machines to interact with the hardware without going through the host operating system. The hypervisor does not allocate the storage space for a virtual machine, control the number of virtual machines a host can accommodate, or manage access to software programs on the host.

Which of the following BEST describes a community cloud implementation?

Designed to be shared by several organizations. Explanation A community cloud is designed to be shared by several organizations. Access is granted only to the users within the organizations who are sharing the community cloud infrastructure. A public cloud can be accessed by anyone. Cloud-based computing resources such as platforms, applications, and storage are made available to the general public through a cloud service provider. A private cloud provides resources to a single organization. Access is granted to only the users within the organization. A hybrid cloud is a combination of public, private, and community cloud resources from different service providers.

Which key advantages do containers have over virtual machines? (Select two.)

Faster start times for containerized applications Smaller size and may only require a few megabytes Explanation The key advantages of virtualized containers include: A container might only occupy a few megabytes, while a virtual machine might take up several gigabytes. A virtual machine may take several minutes to boot, while a containerized application only takes a few seconds to initialize. Virtual machines are portable between different hypervisors, while containers are only portable between different families of operating systems.

What is another name for virtual machines?

Guest operating systems Explanation With virtualization, you can pool multiple operating systems on the same physical hardware. Each OS runs independently and runs its own set of applications. These independent operating systems are called virtual machines, or VMs. You will also hear them called guest operating systems.

What are the benefits of installing integration services (IS) on a Hyper-V Windows virtual machine? (Select two.)

Lets you cut and paste between the virtual machine and host. Dramatically improves performance by installing Hyper-V aware drivers. Explanation The following are benefits of installing IS on a Hyper-V Windows virtual machine: Dramatically improves VM performance by installing (in the VM) modified disk, network, and mouse drivers that are Hyper-V aware. Lets you cut and paste between the host and guest Windows operating systems installed within VMs.

Your company cloud service currently provides data storage, processing, and network connectivity that hosts several services and applications used by your employees. You want to transition to a cloud service that provides many of these services and applications natively without the IT department needing to constantly maintain and update the services and applications. In addition, the IT department wants to make sure that the cloud service provides employees with resources that are segregated from other employees. Which of the following cloud service solutions meets these requirements?

SaaS with a simple multi-tenancy implementation. Explanation Software as a Service (SaaS) would deliver software applications and services to the employees either over the internet or on a local area network. In addition, providing a simple multi-tenancy implementation would allow employees to have their own resources segregated from other employees. In a fine-grain multi-tenancy solution, resources are shared.

Which of the following BEST describes the overall purpose of virtualization?

The ability to install and run multiple operating systems on a single physical machine. Explanation Virtualization is the ability to install and run multiple operating systems simultaneously on a single physical machine.

You want to create a virtualization environment that runs directly on the host machine's hardware to manage the virtual machines. Which of the following virtualization types should you use?

Type 1 hypervisor Explanation A hypervisor is a virtualization component that allows virtual machines to interact with hardware on the host machine. Type 1 runs directly on the host machine's hardware to manage the guest VMs. Type 2 runs on an operating system to manage the guest VM(s) and does not run directly on the host machine's hardware. A VDI (virtualization desktop infrastructure) is designed to be the end user's main computer system, which can be accessed from something like a tablet or thin client. In addition, a VDI can be hosted by a cloud service provider. A VDI does not run directly on the host machine's hardware. Container virtualization is focused on providing a virtual environment for a single application and requires a host machine operating system to run.

Which type of resource offers the following advantages? Flexibility of access Ease of use Self-service resource provisioning API availability Service metering Ability to try out software applications

cloud Explanation Cloud resources offer the following advantages: Flexibility of access Ease of use Self-service resource provisioning API availability Service metering Ability to try out software applications

Match each virtualization component on the left with the appropriate description on the right. Each type of component may be used once, more than once, or not at all. 1. Provides the hardware necessary to create a virtualized environment. 2. A thin layer of software that resides between the virtual machine and hardware. 3. A software implementation of a computer. 4. A file created to store data. 5. Allows virtual machines to interact with hardware.

1. Host machine 2. Hypervisor 3. Virtual machine 4. Virtual hard disk 5. Hypervisor Explanation The following are descriptions of the virtualization components: A host machine provides the hardware necessary to create a viable, virtualized environment. A hypervisor is a thin layer of software that resides between the virtual operating system and the hardware. A hypervisor allows virtual machines to interact with the hardware without going through the host operating system. A virtual machine is a software implementation of a computer that execute programs like a physical machine. A virtual hard disk is a file created within the host operating system that simulates a hard disk for storing data.

Which of the following BEST describe a community cloud? (Select two.)

Commonly hosted externally by a third party. Designed to be shared by several organizations. Explanation Two main characteristics of a community cloud is that it is:: Commonly hosted externally by a third party. Designed to be shared by several organizations. A private cloud only allows access to users within a single organization. A public cloud makes platforms, applications, and storage available to the general public. A hybrid cloud provides a combination of cloud resources from different service providers.

Your company currently has an on-premises cloud solution that provides services to its employees. However, the company would like to begin offering some services to the public from the cloud. Which of the following cloud computing solutions would BEST meet your company's new cloud computing requirements?

Hybrid cloud Explanation The best solution would be to implement a hybrid cloud model, which would accommodate the private on-premises cloud solution and also allow public access to company services.

Which term describes the layer of software that resides between the virtual operating system and the physical hardware in a virtualization environment?

Hypervisor Explanation A hypervisor is a thin layer of software that resides between the virtual operating system(s) and the hardware. A hypervisor allows virtual machines to interact with the hardware without going through the host operating system. A hypervisor manages access to system resources such as: CPU Storage RAM

Which of the following BEST describes the Platform as a Service (PaaS) cloud computing service model?

PaaS delivers everything a developer needs to build an application on the existing cloud infrastructure. Explanation Platform as a Service (PaaS) delivers everything a developer needs to build an application on the existing cloud infrastructure. The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers.

A company has subscribed to a cloud service that offers cloud applications and storage space. Through acquisition, the number of company employees quickly doubled. The cloud service vendor was able to add cloud services for these additional employees without requiring hardware changes. Which of the following cloud concepts does this represent?

Rapid elasticity Explanation Rapid elasticity describes a cloud provider's ability to increase or decrease service levels to meet customers' needs without requiring hardware changes.

Which of the following cloud computing solutions delivers software applications to a client either over the internet or on a local area network?

SaaS Explanation Software as a Service (SaaS) delivers software applications to a client either over the internet or on a local area network. Infrastructure as a Service (IaaS) delivers infrastructure to a client, such as processing, storage, networks, and virtualized environments. The client deploys and runs software without purchasing servers, data center space, or network equipment. Platform as a Service (PaaS) delivers everything a developer needs to build an application on the existing cloud infrastructure. The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers. Data as a Service (DaaS) stores and provides data from a centralized location without the need for local collection and storage.

You have been tasked with creating a new software application and test the development of the software. You want an environment that can be isolated from the production network for the development and testing. What virtualization feature will BEST meet your application development requirements?

Sandbox virtualization Explanation Sandbox virtualization is the process of creating an isolated testing environment. Virtualization lets you easily create a sandbox by isolating components from the production network. Using a virtualized sandbox (sometimes known as a playground) gives you a safe place to create new software, test software development, install new software, or upgrade existing software without risking the production network.

As the network engineer for a large financial institution, you have been given the responsibility to provide a new financial desktop to the financial advisors in all company branch offices. The requirements for the software desktop include: It must be a virtualization solution. It must be hosted in the cloud by a third party. It must run on a tablet. Which of the following virtualization types BEST meets your desktop software requirements?

VDI Explanation A VDI (virtualization desktop infrastructure) is designed to be the end user's main computer system, which can be accessed from something like a tablet or thin client. In addition, a VDI can be hosted by a cloud service provider.