220-1101 Virtualization Concepts Practice Test 2 — 15 Questions

Question 1

A technician needs to deploy a virtual machine that will be used for a short-term project and then deleted. The VM must not consume excessive storage space initially. Which virtual disk type should be chosen?

Accepted Answer

Thin-provisioned virtual disk. Thin provisioning allocates disk space on demand, starting small and growing as needed. This is ideal for temporary VMs to minimize initial storage usage.

Answer

Fixed-size (thick) virtual disk

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Differencing disk

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Dynamic expanding disk

Question 2

A user complains that a virtual machine running on a laptop shuts down unexpectedly when the laptop is unplugged from power. The host has power management settings set to 'Balanced'. What is the most likely cause?

Accepted Answer

The host's power plan is set to 'Balanced', causing the host to sleep when unplugged. Power management settings can put the host to sleep or reduce performance, causing the VM to crash or shut down. The VM relies on the host's power state; changing the plan to 'High Performance' prevents sleep.

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The VM's virtual BIOS is set to power off on AC loss

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The VM is configured with insufficient RAM

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The laptop's battery is failing and cannot supply power

Question 3

A company needs to deploy a virtualized environment where each VM must be isolated from others for security reasons, but all VMs share the same physical network. Which virtual networking configuration should be used?

Accepted Answer

Use a virtual switch with port groups assigned to different VLANs. VLANs provide network isolation at Layer 2, allowing VMs on the same physical network to be separated logically. This is a common security practice in virtualized environments.

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Configure each VM with a different MAC address

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Use bridged networking for all VMs

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Assign each VM a static IP address from a different subnet

Question 4

A technician is setting up a virtual machine for a developer who needs to test software across multiple OS versions. The VM must have direct access to a USB dongle for licensing. Which VM configuration setting must be enabled?

Accepted Answer

Enable USB passthrough and attach the dongle to the VM. USB passthrough allows the VM to directly access a physical USB device, bypassing the host OS. This is required for devices like dongles that need exclusive access.

Answer

Enable USB 3.0 controller in the VM settings

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Configure network bridging for the VM

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Install the dongle driver on the host OS

Question 5

A company wants to consolidate five physical servers into one host to reduce power and cooling costs. Each server runs a different operating system. Which virtualization technology should be used to achieve this?

Accepted Answer

Use a Type 1 hypervisor like VMware ESXi on a single host. Server consolidation uses a Type 1 hypervisor (bare-metal) to run multiple VMs directly on hardware, maximizing resource utilization. This is the standard approach for data center virtualization.

Answer

Install a Type 2 hypervisor on each physical server

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Migrate all applications to a single OS using compatibility layers

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Use containerization instead of virtualization

Question 6

A technician is troubleshooting a VM that fails to boot with the error 'Operating system not found.' The VM was created from a template that uses a virtual SCSI controller. The technician verifies that the ISO file is attached to the virtual DVD drive and the boot order is set to DVD first. What is the most likely cause of the error?

Accepted Answer

The virtual DVD drive is not connected to the VM’s IDE controller.. This error often occurs when the VM cannot find a bootable device. Even with the ISO attached, if the virtual DVD drive is not connected to the correct controller or is not enabled, the VM will not boot from it. The correct answer points to a common oversight: the virtual DVD drive may be on a different controller or not attached.

Answer

The virtual SCSI controller is not compatible with the guest OS.

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The ISO file is corrupted or incomplete.

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The VM’s BIOS is set to UEFI instead of legacy BIOS.

Question 7

A technician is deploying a new virtual machine on a Type 2 hypervisor (hosted) for software testing. The host machine runs Windows 10 Pro with 16 GB RAM and a quad-core CPU. The test application requires 4 GB RAM and two virtual CPUs. After creating the VM with those settings, the technician notices the host becomes extremely sluggish even when the VM is idle. What is the most likely reason for this?

Accepted Answer

The technician allocated too much RAM to the VM, leaving insufficient memory for the host OS.. Type 2 hypervisors run on top of an existing OS and share resources with the host. The host OS needs sufficient RAM for itself; allocating too much to the VM can starve the host. The correct answer highlights the common mistake of over-allocating resources to a VM on a Type 2 hypervisor.

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The hypervisor does not support hardware acceleration for the guest OS.

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The host machine’s CPU does not support Intel VT-x or AMD-V.

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The virtual switch is misconfigured, causing network loops.

Question 8

A company uses VMware vSphere to run multiple VMs on a single ESXi host. A user reports that their VM suddenly lost network connectivity, but other VMs on the same host are working fine. The technician checks the virtual switch configuration and finds that the VM’s virtual NIC is connected to a port group that has no active uplinks. What should the technician do to restore connectivity?

Accepted Answer

Add a physical NIC to the port group as an active uplink.. In virtualization, a port group defines network settings for VMs. If a port group has no active uplinks, VMs in that group cannot communicate outside the host. The correct answer involves either adding an uplink or moving the VM to a working port group. This tests understanding of virtual networking components.

Answer

Reboot the ESXi host to refresh the network stack.

Answer

Change the VM’s virtual NIC type from E1000 to VMXNET3.

Answer

Disable and re-enable the virtual switch.

Question 9

A company uses virtual machines for its production environment. A technician needs to perform maintenance on the host server without disrupting the VMs. The technician wants to move the VMs to another host in the cluster while they are running. Which feature must be configured to allow this?

Accepted Answer

Live migration (vMotion). Live migration (vMotion in VMware, live migration in Hyper-V) allows moving running VMs between hosts with zero downtime. This is a key feature for high availability and maintenance. The correct answer directly names this feature.

Answer

Virtual machine snapshots

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Virtual switch trunking

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Resource pooling

Question 10

A small business runs a single physical server hosting three virtual machines (VMs) for file sharing, database, and email. The server has 32 GB of RAM, and each VM is allocated 8 GB. Users report that the file-sharing VM is extremely slow. The hypervisor shows the host has 4 GB of RAM free. Which of the following is the most likely cause of the performance issue?

Accepted Answer

The file-sharing VM has been allocated insufficient RAM and is experiencing memory ballooning.. The scenario describes memory overcommitment, where the total allocated RAM (24 GB) plus the host overhead leaves only 4 GB free. The file-sharing VM is likely starved for memory because the hypervisor is swapping or ballooning memory to compensate. The correct answer identifies that the VM needs more RAM than currently allocated, which is a common virtualization performance bottleneck.

Answer

The hypervisor is not configured to use hardware-assisted virtualization.

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The file-sharing VM’s virtual hard disk is stored on a slow USB 2.0 external drive.

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The network switch port for the server is set to half-duplex.

Question 11

A company plans to migrate a physical server running a legacy application to a virtual machine to reduce hardware costs. The application requires direct access to a proprietary PCIe card installed in the physical server. Which virtualization feature must the hypervisor support to allow the VM to use this card?

Accepted Answer

PCI passthrough (VT-d/IOMMU). Direct access to physical hardware like a PCIe card requires hardware passthrough technology, such as Intel VT-d or AMD IOMMU. This allows a VM to directly control the device without going through the hypervisor. The correct answer tests knowledge of advanced virtualization features for hardware compatibility.

Answer

Virtual machine snapshots

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Virtual switch VLAN tagging

Answer

Virtual machine migration (vMotion)

Question 12

A user reports that a VM running Linux suddenly displays a 'Kernel Panic' error after the technician applied a snapshot and then reverted to it. The snapshot was taken while the VM was running. What is the most likely cause of the kernel panic?

Accepted Answer

The snapshot captured the VM in a state where the file system was inconsistent (e.g., during a write operation).. Taking a snapshot of a running VM captures the state of the virtual disk and memory, but if the file system is in an inconsistent state (e.g., during a write operation), reverting to that snapshot can cause corruption. The correct answer identifies that the snapshot was taken at an inopportune time, leading to file system inconsistency.

Answer

The snapshot file became corrupted due to insufficient disk space.

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The VM’s virtual disk was configured as thin provisioned and ran out of space.

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The hypervisor’s time synchronization caused a clock skew.

Question 13

A technician is tasked with deploying a virtualized environment for a small office using a single server. The server has 64 GB RAM, two 6-core CPUs, and a RAID 10 array. The technician needs to run four VMs: a domain controller (4 GB), a file server (8 GB), a web server (4 GB), and a database server (16 GB). After deployment, the database server is performing poorly. The technician notices that the hypervisor has allocated 2 virtual CPUs to each VM. Which of the following is the most likely cause of the database server’s poor performance?

Accepted Answer

The database server VM should have more virtual CPUs allocated, such as 4 vCPUs.. The database server is likely CPU-starved because it has only 2 vCPUs while other VMs also have 2 vCPUs, leading to contention on the physical cores. The correct answer involves adjusting CPU allocation to match workload demands. This tests understanding of CPU scheduling in virtualization.

Answer

The RAID 10 array is not fast enough for database I/O.

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The hypervisor is using a Type 2 hypervisor, causing overhead.

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The virtual switch is configured for 100 Mbps instead of 1 Gbps.

Question 14

A technician is setting up a virtual lab on a laptop with 8 GB RAM and a dual-core CPU. The technician creates two VMs: one with 4 GB RAM and one with 2 GB RAM. The host OS is Windows 10. When both VMs are running, the laptop becomes unresponsive and the VMs are extremely slow. The technician checks resource monitor and sees that the host is using 95% of RAM. What should the technician do to improve performance without purchasing new hardware?

Accepted Answer

Reduce the RAM allocation of the 4 GB VM to 2 GB.. Over-allocating RAM to VMs on a host with limited memory causes swapping and poor performance. The best solution is to reduce the RAM allocated to the VMs or use dynamic memory allocation if supported. The correct answer focuses on adjusting VM memory settings, which is a practical troubleshooting step.

Answer

Enable hardware virtualization in the BIOS.

Answer

Convert the VMs to use dynamic memory allocation.

Answer

Move the VMs to a Type 1 hypervisor.

Question 15

A technician is configuring a new VM for a developer who needs to test software on Windows 10. The host runs Hyper-V on Windows Server 2019. The developer requests that the VM have 8 GB RAM and 4 virtual CPUs. After creating the VM, the technician finds that the VM will not start and displays an error: 'The virtual machine could not be started because the hypervisor is not running.' What is the most likely solution?

Accepted Answer

Enable Intel VT-x or AMD-V in the host’s BIOS/UEFI settings.. Hyper-V requires the Windows Hyper-V role to be installed and the hardware virtualization features (VT-x/AMD-V) to be enabled in the BIOS. If the hypervisor is not running, it is often because virtualization is disabled in BIOS or the Hyper-V role is not properly configured. The correct answer addresses enabling virtualization in BIOS.

Answer

Install the latest Windows updates and reboot the host.

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Change the VM’s generation from Generation 2 to Generation 1.

Answer

Reinstall the Hyper-V role from Server Manager.