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CompTIA A+ Core 1 220-1201 - Domain 4 Virtualization and Cloud Computing

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Question 1

An enterprise is running a VMware vSphere environment. Multiple VMs share the same physical server. One VM begins consuming 95% of the physical CPU resources, causing other VMs to slow significantly. Which VMware feature limits CPU consumption per VM?

Answer choices

  • A. vSphere HA (High Availability)

  • B. CPU resource reservations and limits (vCPU scheduling) (Correct)

  • C. vMotion

  • D. vSAN

Explanation

VMware vSphere allows administrators to set CPU reservations (guaranteed minimum), shares (relative priority), and limits (maximum CPU usage) per VM to prevent any single VM from monopolizing physical host resources.

Question 2

A company uses containers to deploy its microservices application. How do containers differ from traditional virtual machines?

Answer choices

  • A. Containers include a full OS kernel; VMs do not

  • B. Containers share the host OS kernel and are more lightweight; VMs include full OS instances (Correct)

  • C. Containers require a Type 1 hypervisor; VMs require Type 2

  • D. Containers are more secure than VMs due to complete isolation

Explanation

Containers share the host OS kernel and package only the application and its dependencies, making them lightweight and fast to start. VMs include a full OS instance (guest OS), making them more isolated but heavier on resources.

Question 3

A technician needs to provide network connectivity to virtual machines running on a Type 1 hypervisor. Which component provides network switching capabilities within the virtualization platform?

Answer choices

  • A. Physical switch in the datacenter rack

  • B. Virtual switch (vSwitch) (Correct)

  • C. VLAN trunk port

  • D. Software-defined WAN

Explanation

A virtual switch (vSwitch) is a software-based network switch created within the hypervisor. It allows VMs to communicate with each other and with the physical network through the host's physical NICs, providing VLAN support, port groups, and traffic policies.

Question 4

A hospital wants to keep patient data on-premises for compliance while using public cloud resources for non-sensitive workloads like scheduling and HR. What deployment model does this describe?

Answer choices

  • A. Public cloud

  • B. Private cloud

  • C. Community cloud

  • D. Hybrid cloud (Correct)

Explanation

A hybrid cloud combines private cloud/on-premises infrastructure with public cloud resources, allowing data and applications to be shared between them. This enables compliance-sensitive workloads to remain on-premises while leveraging public cloud scalability.

Question 5

A technician is setting up a VM and needs to allocate storage. They configure a 100GB virtual disk but want it to only use actual space as data is written (not pre-allocate the full 100GB immediately). Which disk provisioning type should they choose?

Answer choices

  • A. Thick provisioning

  • B. Thin provisioning (Correct)

  • C. Raw Device Mapping

  • D. VMDK flat file

Explanation

Thin provisioning allocates virtual disk space on-demand as data is actually written, rather than reserving the full capacity upfront. This conserves physical storage. Thick provisioning reserves all space immediately, ensuring performance but consuming storage immediately.