220-1201 Practice Exam 56 — 20 Questions

Question 1

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.

Answer

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

Answer

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

Question 2

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.

Answer

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

Answer

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

Answer

The virtual switch is misconfigured, causing network loops.

Question 3

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 4

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.

Answer

The ISO file is corrupted or incomplete.

Answer

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

Question 5

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

Answer

Virtual switch VLAN tagging

Answer

Virtual machine migration (vMotion)

Question 6

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 7

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.

Answer

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

Answer

The hypervisor’s time synchronization caused a clock skew.

Question 8

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.

Answer

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

Answer

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

Question 9

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.

Answer

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

Answer

Reinstall the Hyper-V role from Server Manager.

Question 10

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

Answer

Virtual switch trunking

Answer

Resource pooling

Question 11

A user complains that their cloud-hosted virtual desktop is slow to open applications and frequently disconnects. They are using a satellite internet connection. Which cloud characteristic is most likely being impacted?

Accepted Answer

Latency. This scenario tests understanding of cloud computing characteristics, specifically latency. Slow application opening and disconnections are classic symptoms of high latency, which is often caused by the physical distance data must travel over a satellite connection. The other options (elasticity, scalability, high availability) are cloud features that do not directly address network delay.

Answer

High availability

Answer

Elasticity

Answer

Scalability

Question 12

A small business wants to migrate its email and document collaboration to the cloud but must keep sensitive financial records on local servers due to regulatory requirements. Which cloud deployment model should they choose?

Accepted Answer

Hybrid cloud. This question covers cloud deployment models. A hybrid cloud combines public cloud services (for email/collaboration) with private or on-premises infrastructure (for sensitive data). Public cloud alone would violate regulations, community cloud is for shared industry needs, and private cloud is entirely on-premises, missing the benefits of public cloud for non-sensitive workloads.

Answer

Public cloud

Answer

Private cloud

Answer

Community cloud

Question 13

A company uses a cloud-based customer relationship management (CRM) application. The vendor handles all updates, security patches, and infrastructure maintenance. Which cloud service model does this represent?

Accepted Answer

Software as a Service (SaaS). This scenario describes Software as a Service (SaaS), where the provider delivers a complete application over the internet. The user only needs a web browser and does not manage the underlying OS, servers, or updates. IaaS would give virtual machines, PaaS would provide a development platform, and DaaS would deliver virtual desktops.

Answer

Infrastructure as a Service (IaaS)

Answer

Platform as a Service (PaaS)

Answer

Desktop as a Service (DaaS)

Question 14

A user reports that their cloud storage files are not syncing to their laptop. The internet connection is working, and other cloud services are accessible. Which of the following is the most likely cause?

Accepted Answer

The cloud sync client application is not running. This question tests troubleshooting cloud synchronization issues. A common cause is the client application being stopped or crashed, which prevents syncing despite a working internet connection. Account suspension would block access entirely, firewall rules would affect other services too, and server downtime would impact all users, not just one.

Answer

The cloud storage server is down for maintenance

Answer

The user's account has been suspended

Answer

A firewall is blocking the sync port

Question 15

A technician is configuring a cloud-based virtual machine for a web server. The VM needs to handle traffic spikes automatically without manual intervention. Which cloud characteristic should be enabled?

Accepted Answer

Elasticity. This scenario tests the concept of elasticity in cloud computing. Elasticity allows resources to automatically scale up or down based on demand, which is ideal for handling traffic spikes. Scalability is a broader term that can include manual scaling, while high availability and fault tolerance focus on uptime, not automatic adjustment to load changes.

Answer

High availability

Answer

Fault tolerance

Answer

Scalability

Question 16

A company uses a cloud-based virtual desktop infrastructure (VDI) solution. Users report that logging in takes 5 minutes during peak hours. The IT team notices that the cloud provider's resource utilization is at 95%. Which action would best resolve this issue?

Accepted Answer

Scale up the virtual machines by increasing CPU and RAM. This question addresses resource contention in cloud VDI. High utilization (95%) indicates the provider's resources are saturated, causing slow logins. Scaling up (vertical scaling) by increasing the VM size provides more CPU/RAM per user, improving performance. Scaling out adds more VMs but doesn't address the root cause of resource saturation on existing VMs. Migrating to a different model or disabling auto-scaling could worsen the issue.

Answer

Migrate to a different cloud provider

Answer

Scale out by adding more virtual desktops

Answer

Disable automatic scaling

Question 17

A user receives an error when trying to access a cloud application: 'This application is not available in your region.' The user is traveling abroad. Which cloud concept is most likely causing this restriction?

Accepted Answer

Geolocation. This scenario tests understanding of geolocation restrictions in cloud services. Many cloud applications use geolocation to enforce licensing, compliance, or content restrictions based on the user's physical location. High availability, multi-tenancy, and resource pooling are unrelated to region-based access controls.

Answer

High availability

Answer

Multi-tenancy

Answer

Resource pooling

Question 18

A technician is deploying a cloud-based application that requires a specific operating system and database. The company wants to avoid managing the underlying OS and patches. Which cloud service model should be used?

Accepted Answer

Platform as a Service (PaaS). This question tests the distinction between PaaS and other service models. Platform as a Service (PaaS) provides a managed platform including OS, runtime, and database, allowing the customer to focus on deploying their application without patching the OS. IaaS gives full control but requires OS management, SaaS is a finished application, and DaaS is for virtual desktops.

Answer

Infrastructure as a Service (IaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 19

A company uses a public cloud provider for compute resources. To reduce costs, they want to use unused capacity at a lower price but accept that the instance may be terminated with short notice. Which pricing model should they choose?

Accepted Answer

Spot instance. This question tests knowledge of advanced cloud pricing models. A spot instance (or preemptible VM) uses unused cloud capacity at a steep discount but can be terminated when the provider needs the resources back. On-demand is full price, reserved is for long-term commitments, and dedicated hosts are for isolation, not cost savings with termination risk.

Answer

On-demand instance

Answer

Reserved instance

Answer

Dedicated host

Question 20

A user reports that their cloud-based application is running slowly, and the IT team discovers that the application is hosted in a different geographic region than the user. Which cloud concept is most directly affecting performance?

Accepted Answer

Latency. This scenario tests understanding of latency in a global cloud context. When an application is hosted far from the user, the physical distance increases network latency, causing slow performance. Bandwidth could be a factor but is not directly tied to geographic distance, while elasticity and fault tolerance are unrelated to the location of the host.

Answer

Bandwidth

Answer

Elasticity

Answer

Fault tolerance