220-1101 Virtualization and Cloud Computing Practice Test 9 — 15 Questions

Question 1

A company hosts a critical database on a virtual machine in a public cloud. The database requires persistent storage that must be retained even if the VM is terminated. The storage must also be accessible from multiple VMs simultaneously for a future high-availability configuration. Which type of cloud storage BEST meets these requirements?

Accepted Answer

File storage. File storage (C) is correct because it provides a shared, persistent file system that can be mounted by multiple VMs simultaneously, typically using NFS or SMB/CIFS protocols. This meets the requirement for persistent storage that survives VM termination and supports concurrent read/write access for a future high-availability configuration.

Answer

Object storage

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Block storage

Answer

Ephemeral storage

Question 2

A cloud administrator is migrating a virtual machine from a private cloud to a public cloud. The VM must retain its hostname and IP address. The public cloud provider does not support the same hypervisor as the private cloud. Which of the following migration methods is MOST appropriate?

Accepted Answer

Virtual-to-virtual (V2V). Virtual-to-virtual (V2V) migration is the correct method because it converts a virtual machine from one hypervisor format to another, allowing the VM to run on a public cloud provider that uses a different hypervisor than the private cloud. This process preserves the guest OS, applications, and configuration, including the hostname and IP address, by converting the virtual disk and metadata to the target hypervisor's format.

Answer

Physical-to-virtual (P2V)

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Live migration

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Cloning

Question 3

A company uses a public cloud IaaS provider. They have a virtual machine that runs a legacy application requiring a static IP address. The VM needs to be migrated to a different physical host within the same datacenter due to scheduled maintenance. The application cannot tolerate more than a few seconds of downtime. Which feature should the cloud administrator use?

Accepted Answer

Live migration. Live migration (B) is correct because it allows a running virtual machine to be moved between physical hosts with virtually no downtime, typically under a second. This meets the requirement of a static IP address (the VM's network identity is preserved) and the sub-second tolerance for downtime during scheduled maintenance.

Answer

Auto-scaling

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Snapshot and restore

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High availability

Question 4

A company has a legacy virtual machine running on a deprecated hypervisor (Hyper-V). They want to migrate this VM to a new hypervisor (VMware vSphere) hosted in a private cloud while preserving the VM's configuration, installed applications, and data. The migration must be performed with minimal downtime. Which of the following methods is MOST appropriate?

Accepted Answer

Export the VM as an OVF template and import it into the new hypervisor.. Exporting the VM as an OVF (Open Virtualization Format) template is the most appropriate method because OVF is a hypervisor-agnostic standard that encapsulates the VM's configuration, virtual disks, and metadata. This allows the VM to be imported into VMware vSphere while preserving its installed applications and data, and the export/import process can be performed with minimal downtime by shutting down the VM only during the export phase.

Answer

Perform a physical-to-virtual (P2V) conversion using third-party tools.

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Use live migration (vMotion) to move the VM between hypervisors.

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Rebuild the VM from scratch on the new hypervisor and restore data from backup.

Question 5

A company hosts a web application on a virtual machine in a public cloud. The application requires a storage solution that can be accessed from multiple VMs simultaneously and will persist even if the VM hosting the application is terminated. Which of the following storage types BEST meets these requirements?

Accepted Answer

Network-attached storage (NAS). Network-attached storage (NAS) provides file-level access over a network (typically using NFS or SMB/CIFS protocols), allowing multiple VMs to read and write to the same storage concurrently. Because the storage is independent of any single VM, it persists even after the VM hosting the application is terminated, making it the ideal choice for shared, persistent storage in a cloud environment.

Answer

Object storage

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Block storage

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Direct-attached storage (DAS)

Question 6

A company operates a private cloud environment with a cluster of physical hosts running virtual machines. The IT administrator wants to ensure that if a physical host fails unexpectedly, the virtual machines running on that host will be automatically restarted on another healthy host in the cluster without manual intervention. Which feature should the administrator configure?

Accepted Answer

High availability (HA). High Availability (HA) is the correct feature because it is designed to automatically restart virtual machines on another healthy host within a cluster when a physical host fails. HA uses heartbeat monitoring between hosts and the vCenter Server (or equivalent management platform) to detect failures, then triggers VM restarts on surviving hosts without manual intervention. This directly matches the requirement for automatic recovery from an unexpected host failure.

Answer

Fault tolerance (FT)

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Load balancing

Answer

Live migration

Question 7

A small business uses a cloud-based customer relationship management (CRM) system that is accessed entirely through a web browser. The business does not manage the underlying operating system, middleware, or hardware. Which cloud computing service model does this scenario BEST describe?

Accepted Answer

Software as a Service (SaaS). This scenario describes Software as a Service (SaaS) because the business consumes a fully functional CRM application delivered over the web, with no control over the underlying operating system, middleware, or hardware. The provider manages the entire stack, and the customer only accesses the software via a browser, which is the defining characteristic of SaaS.

Answer

Infrastructure as a Service (IaaS)

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Platform as a Service (PaaS)

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Desktop as a Service (DaaS)

Question 8

A company runs a batch processing job on a virtual machine in a public cloud. The job runs once a month and requires significant CPU and RAM resources for about 2 hours. The company wants to minimize cost while ensuring the resources are available when needed. Which cloud characteristic should they leverage?

Accepted Answer

Rapid elasticity. Rapid elasticity allows the virtual machine to automatically scale up to the required CPU and RAM resources for the 2-hour batch job and then scale back down to zero or minimal resources, ensuring resources are available only when needed. This minimizes cost by avoiding paying for idle capacity during the rest of the month, which is the core benefit of elastic cloud computing.

Answer

Measured service

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Resource pooling

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On-demand self-service

Question 9

A database virtual machine in a private cloud is experiencing slow performance. The VM's virtual disk is stored on a network-attached storage (NAS) device accessed over a 1 GbE connection. The database requires very high input/output operations per second (IOPS) and low latency. Which of the following would provide the BEST improvement in storage performance?

Accepted Answer

Store the virtual disk on a local SSD within the host server.. Storing the virtual disk on a local SSD within the host server eliminates network latency and contention from the 1 GbE connection, providing the low latency and high IOPS required by the database. Local SSDs offer orders of magnitude lower latency than NAS over Ethernet, directly addressing the performance bottleneck.

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Move the virtual disk to an object storage bucket.

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Increase the allocated RAM of the VM.

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Use thin provisioning to reduce the disk size.

Question 10

A company runs a web application on a virtual machine (VM) in a public cloud. The application experiences a sudden spike in traffic lasting about 45 minutes every day at lunchtime. The VM currently has 4 vCPUs and 8 GB of RAM, which is sufficient for normal traffic but causes slow response times during the spike. The company wants to ensure the application performs well during spikes without permanently upgrading the VM to larger resources. Which cloud characteristic should the administrator use to meet this requirement?

Accepted Answer

Elasticity. Elasticity in cloud computing refers to the ability to automatically scale resources up or down based on demand, and then scale back down to reduce costs when the demand subsides. This is ideal for predictable but temporary spikes like the one described. Scalability is a broader term that refers to the ability to increase resources, but it does not inherently include automatic scaling down. Metered service means you pay for what you use, but it does not provide automatic scaling. High availability ensures uptime but does not adjust resource sizing based on load. Therefore, elasticity is the correct characteristic for this scenario.

Answer

Scalability

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Metered service

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High availability

Question 11

A company runs a critical web application on a virtual machine in a public cloud. To ensure high availability during traffic spikes and hardware failures, the administrator wants to distribute incoming traffic across multiple identical VMs. Which of the following cloud solutions BEST meets this requirement?

Accepted Answer

Deploy a load balancer to distribute traffic across the VM instances.. A load balancer (Option B) is the correct solution because it actively distributes incoming traffic across multiple identical VM instances, providing high availability by automatically rerouting traffic away from failed instances. Unlike DNS-based methods, a load balancer performs health checks and can handle traffic spikes without relying on client-side caching or TTL propagation delays.

Answer

Configure an auto-scaling group to add more VMs during high demand.

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Set up DNS round-robin with multiple A records pointing to each VM.

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Establish a site-to-site VPN connection to the cloud provider's network.

Question 12

A company hosts a critical database on a virtual machine (VM) in a public cloud IaaS environment. The database requires high IOPS and low latency. The data must persist even if the VM is stopped or terminated. Additionally, the administrator needs to take frequent snapshots for backup. Which of the following storage types should be used for the database VM?

Accepted Answer

Block storage. Block storage (e.g., AWS EBS, Azure Managed Disks) provides raw, low-latency volumes that can be attached to a VM, supporting high IOPS for database workloads. Data persists independently of the VM lifecycle—even if the VM is stopped or terminated—and snapshots can be taken for backup. This makes block storage the correct choice for a critical database requiring persistence and frequent snapshots.

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Object storage

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File storage

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Ephemeral storage

Question 13

A company runs a web application on a virtual machine (VM) in a public cloud IaaS environment. The application experiences unpredictable traffic spikes throughout the day, sometimes lasting 30 minutes. The company wants to ensure consistent performance during spikes while minimizing costs. The current single VM (4 vCPUs, 8 GB RAM) is sufficient for normal load but becomes slow during spikes. Which cloud characteristic should the administrator implement to address this requirement?

Accepted Answer

Elasticity. Elasticity is the correct answer because it allows the cloud infrastructure to automatically scale resources up during traffic spikes and scale down when demand decreases, ensuring consistent performance while minimizing costs. In an IaaS environment, this is typically achieved through auto-scaling groups that add or remove VM instances based on metrics like CPU utilization or request count, matching the unpredictable, short-duration spikes described.

Answer

High availability

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Load balancing

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Fault tolerance

Question 14

A company is migrating its large collection of user-uploaded photos and videos to a cloud service. The data is unstructured, accessed infrequently, and must be available via HTTP/HTTPS URLs. The IT administrator wants the most cost-effective storage solution that scales automatically without provisioning capacity in advance. Which cloud storage type should the administrator choose?

Accepted Answer

Object storage. Object storage is the correct choice because it is designed for unstructured data like photos and videos, accessed infrequently, and provides HTTP/HTTPS access via RESTful APIs. It scales automatically without requiring capacity provisioning, and its pay-as-you-go model makes it the most cost-effective for this use case.

Answer

Block storage

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File storage

Answer

Hot storage tier

Question 15

A graphic design company needs to render a complex 3D animation that will take approximately 4 hours to complete. The rendering software requires a powerful CPU and a large amount of RAM. The company's on-premises workstations are not powerful enough, and they do not want to purchase new hardware. Which cloud computing characteristic would BEST allow them to complete this task cost-effectively?

Accepted Answer

Elasticity. Elasticity allows the company to provision cloud-based virtual machines with the required CPU and RAM for the duration of the rendering task (4 hours) and then de-provision them immediately after, paying only for the compute time used. This avoids the capital expenditure of purchasing new hardware and is cost-effective because resources scale up on demand and scale down when no longer needed.

Answer

Metered service / measured service

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Resource pooling

Answer

High availability