220-1101 Virtualization and Cloud Computing Practice Test 5 — 15 Questions

Question 1

A company currently hosts its own on-premises email server. To reduce hardware maintenance overhead, they decide to move the email server to the cloud. They require the ability to install and manage their own email application (e.g., Microsoft Exchange), including the underlying operating system, while the cloud provider is responsible for the physical infrastructure and virtualization layer. Which cloud service model best meets these requirements?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines with full control over the operating system and applications. This model allows the company to install and manage their own email application (e.g., Microsoft Exchange) and the underlying OS, while the cloud provider handles the physical hardware and virtualization layer. The requirement to manage the OS and application rules out PaaS and SaaS, which abstract away that control.

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Platform as a Service (PaaS)

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Software as a Service (SaaS)

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Desktop as a Service (DaaS)

Question 2

A company wants to migrate its customer relationship management (CRM) application to the cloud. The CRM requires a specific version of Windows Server and custom software that the IT team needs to install and manage. The company wants to minimize hardware costs but retain full control over the operating system and applications. Which cloud service model is most appropriate?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines with full control over the operating system and installed software. This model allows the company to run a specific version of Windows Server and custom CRM software while minimizing hardware costs through shared infrastructure.

Answer

Software as a Service (SaaS)

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Platform as a Service (PaaS)

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Desktop as a Service (DaaS)

Question 3

A company wants to migrate its internal web application to the cloud to reduce hardware maintenance costs and improve scalability. The IT team needs full control over the operating system and application software, but they want the cloud provider to manage the physical servers and virtualization layer. Which cloud service model best meets these requirements?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the IT team full control over the operating system, applications, and middleware while the cloud provider manages the physical hardware and hypervisor layer. This matches the requirement for reduced hardware maintenance and scalability without sacrificing OS-level control.

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Platform as a Service (PaaS)

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Software as a Service (SaaS)

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Desktop as a Service (DaaS)

Question 4

A company runs a critical database server on a virtual machine hosted on a Type 1 hypervisor. The requirement is that the database server must remain operational and accessible even if the underlying physical host experiences a hardware failure. Which of the following virtualization features should be implemented to achieve this goal?

Accepted Answer

Fault tolerance. Fault tolerance (B) is correct because it creates a secondary, shadow virtual machine that runs in lockstep with the primary VM. If the physical host fails, the secondary VM takes over instantly with no data loss or downtime, ensuring the database server remains operational.

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Live migration

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Load balancing

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Snapshot

Question 5

A company wants to allow multiple developers to each have their own isolated environment on a single physical server. Each developer needs full control over their own operating system and the ability to install custom applications. Which technology is BEST suited for this requirement?

Accepted Answer

Virtualization. Virtualization (A) is the best choice because it allows multiple virtual machines (VMs) to run on a single physical server, each with its own full operating system (OS) instance. Each developer gets isolated, full control over their OS and can install custom applications, as the hypervisor (e.g., VMware ESXi, Microsoft Hyper-V) abstracts the hardware and allocates dedicated resources (CPU, RAM, storage) per VM.

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Containerization

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Cloud computing

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Dual boot

Question 6

A company runs a critical web server on a virtual machine hosted on a Type 1 hypervisor cluster. The cluster consists of two physical hosts connected to a shared storage array. The IT manager requires that if one host fails, the VM should automatically restart on the other host without manual intervention. Which virtualization feature should be configured?

Accepted Answer

High Availability. High Availability (HA) is the correct feature because it automatically restarts a virtual machine on a surviving host in a cluster when the original host fails, without requiring manual intervention. This is achieved by monitoring heartbeat signals between hosts and the shared storage; if a host stops responding, HA triggers the VM restart on another host. The scenario explicitly requires automatic restart on host failure, which is the primary function of HA in a Type 1 hypervisor cluster.

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Live Migration

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Fault Tolerance

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Load Balancing

Question 7

A small business uses a cloud service where they can deploy custom web applications written in various programming languages. They do not want to manage any servers, operating systems, or runtime environments. The cloud provider handles all underlying infrastructure, scaling, and patching. Which cloud service model is being used?

Accepted Answer

Platform as a Service (PaaS). Platform as a Service (PaaS) provides a managed platform where developers can deploy custom applications without managing the underlying servers, operating systems, or runtime environments. The cloud provider handles infrastructure, scaling, and patching, which matches the scenario exactly.

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Infrastructure as a Service (IaaS)

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Software as a Service (SaaS)

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Desktop as a Service (DaaS)

Question 8

A technician is deploying a new virtual machine for a development team. The host server has limited physical storage, and the VM will be used for testing software that requires a minimal amount of disk space initially. However, the development team anticipates that the VM's disk usage will grow significantly over time as more software is installed. The technician wants to allocate the required storage in a way that does not consume the entire allotment upfront, allowing the host to overcommit storage. Which virtualization feature should the technician configure for the VM's virtual hard disk?

Accepted Answer

Thin provisioning. Thin provisioning allows the virtual hard disk to be created with a specified maximum size but only consumes physical storage on the host as data is written to the VM. This enables storage overcommitment, where the host can allocate more virtual disk space than physical storage exists, because the unused space is not pre-allocated. This matches the requirement to avoid consuming the entire allotment upfront while accommodating future growth.

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Thick provisioning (eager zeroed)

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Thick provisioning (lazy zeroed)

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Deduplication

Question 9

A systems administrator is configuring virtual machines on a Type 1 hypervisor. The physical host has one CPU with 4 physical cores and Hyper-Threading enabled, providing 8 logical processors. The administrator creates a virtual machine for a database application that is known to be CPU-intensive. The administrator assigns 6 virtual CPUs to this VM. After deployment, users report the database VM is performing very poorly, even though the host's overall CPU utilization is only 40%. What is the most likely cause of the poor performance?

Accepted Answer

B. The correct answer is B. The physical host has only 8 logical processors (4 cores × 2 threads each). Assigning 6 virtual CPUs to a single VM means that VM will compete for CPU scheduler time across those 8 logical processors. However, because the VM has more vCPUs than physical cores (6 vCPUs vs 4 cores), the hypervisor must time-slice heavily, causing CPU scheduling overhead and cache thrashing. Even at 40% host utilization, the VM's performance suffers because the hypervisor cannot efficiently schedule 6 vCPUs across only 4 physical cores without significant context-switching and resource contention.

Answer

A

Answer

C

Answer

D

Question 10

A company uses a Type 1 hypervisor to host multiple virtual machines. One VM runs a legacy application that requires a specific MAC address for licensing. The administrator needs to move the VM from the current host to another physical host without changing the MAC address. Which of the following virtualization features should the administrator use?

Accepted Answer

C. Virtual network interface card (vNIC) MAC address assignment. Option C is correct because setting a static MAC address on the virtual network interface card (vNIC) allows the VM to retain its assigned MAC address regardless of which physical host it runs on. This is essential for the legacy application's licensing, which is tied to that specific MAC address. The administrator can configure this in the hypervisor's VM settings before or during migration.

Answer

A. Migration with hardware resource remapping

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B. MAC address spoofing

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D. Virtual switch port security

Question 11

A server administrator needs to apply a critical security patch to a production virtual machine. The patch has the potential to cause the VM to become unstable. Which of the following should the administrator do FIRST to minimize the risk of a prolonged outage?

Accepted Answer

Take a snapshot of the VM. Taking a snapshot captures the VM's current state, including disk data and memory, allowing the administrator to revert instantly if the patch causes instability. This minimizes downtime compared to a full backup, which requires a restore process. Snapshots are designed for quick rollback in virtualized environments like VMware vSphere or Hyper-V.

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Create a full backup of the VM to a separate storage location

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Migrate the VM to another physical host

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Power off the VM before applying the patch

Question 12

A company hosts multiple VMs on a Type 1 hypervisor. The physical host has two NICs configured in a teamed pair for redundancy and load balancing. The administrator creates a new VM and attaches it to a virtual switch that is bound to the NIC team. The VM can communicate with other VMs on the same host but cannot communicate with any devices on the physical LAN. Other VMs on the same host can reach the physical LAN. Which of the following is the most likely cause?

Accepted Answer

The VM is assigned to a VLAN that is not allowed on the physical switch ports.. The VM can communicate with other VMs on the same host but not with the physical LAN, while other VMs on the same host can reach the LAN. This indicates the virtual switch is correctly bound to the NIC team and the host has external connectivity, but the specific VM is isolated at Layer 2. The most likely cause is that the VM is assigned to a VLAN that is not allowed (pruned) on the physical switch ports, so its tagged frames are dropped by the upstream switch, preventing any communication beyond the hypervisor.

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The VM's virtual switch is configured as an internal-only switch.

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The NIC teaming mode is set to fault tolerance only.

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The VM's network adapter is set to the wrong MAC address.

Question 13

A system administrator needs to add a new virtual hard disk to a running virtual machine without powering it off. The hypervisor supports this capability. Which feature should the administrator use?

Accepted Answer

Hot plug. Hot plug (also called hot add) allows a system administrator to add a virtual hard disk to a running virtual machine without powering it off, provided the hypervisor and guest OS support it. This feature leverages the SCSI or SATA hot-plug capability, enabling the virtual controller to detect and enumerate the new disk dynamically. It is commonly used in VMware vSphere and Hyper-V environments to expand storage without downtime.

Answer

Snapshots

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Thin provisioning

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Live migration

Question 14

A system administrator manages a virtualized web server on a Type 1 hypervisor. The web server's memory usage fluctuates significantly throughout the day due to varying traffic. The administrator wants the VM to automatically use only the memory it needs, allowing the hypervisor to reclaim unused memory for other VMs. Which feature should the administrator configure on the VM?

Accepted Answer

Memory ballooning. Memory ballooning is a feature in virtualization that allows the hypervisor to reclaim unused memory from a VM by inflating a 'balloon' driver inside the guest OS, which forces the guest to release memory pages back to the hypervisor. This is ideal for the described scenario where the VM's memory usage fluctuates, as it dynamically adjusts the VM's memory footprint without requiring a reboot or manual intervention.

Answer

Virtual machine snapshots

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Fault tolerance

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CPU hot-add

Question 15

A business uses a cloud service that automatically increases the number of virtual servers during peak traffic hours and decreases them during low usage, all without manual intervention. The policy is predefined in the cloud management console. This scenario best exemplifies which characteristic of cloud computing?

Accepted Answer

Rapid elasticity. Rapid elasticity is the correct characteristic because the cloud service automatically scales virtual server resources up and down based on predefined policies, matching demand without manual intervention. This dynamic scaling—adding instances during peak traffic and removing them during low usage—is the core definition of rapid elasticity in cloud computing, as it allows resources to expand and contract elastically to meet workload changes.

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On-demand self-service

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Resource pooling

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Measured service