220-1101 Practice Test 31 — 15 Questions

Question 1

A cloud administrator needs to increase the amount of RAM allocated to a running virtual machine (VM) from 4GB to 8GB to handle a temporary workload spike. The administrator logs into the cloud management console, selects the VM, and changes the instance type to one with 8GB of RAM. The change takes effect immediately without requiring a reboot. Which cloud computing characteristic does this scenario BEST illustrate?

Accepted Answer

Rapid elasticity. Rapid elasticity is the cloud characteristic that allows resources to be scaled up or down quickly and automatically, often without requiring a reboot. In this scenario, the administrator changes the instance type to one with 8GB of RAM, and the change takes effect immediately, demonstrating the rapid provisioning and de-provisioning of resources to meet workload demands.

Answer

Measured service

Answer

Resource pooling

Answer

On-demand self-service

Question 2

A company hosts a production database on a public cloud IaaS platform. The database requires consistent low-latency access to a storage volume that can be attached to a single virtual machine. The volume must persist independently of the VM's lifecycle, meaning data should remain intact even if the VM is stopped and started. The workload requires up to 10,000 IOPS. Which of the following cloud storage types should the technician configure to meet these requirements?

Accepted Answer

C. Option C (persistent SSD block storage) is correct because it provides a block-level storage volume that can be attached to a single VM, delivers up to 10,000 IOPS, and persists independently of the VM lifecycle. This matches the requirements for a production database needing consistent low-latency access and data retention across VM stop/start events.

Answer

A

Answer

B

Answer

D

Question 3

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.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 4

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

Answer

Resource pooling

Answer

On-demand self-service

Question 5

A company has a router with four Ethernet ports. They need to connect 12 wired devices in the same LAN segment. All devices must receive IP addresses from the same DHCP server running on the router. Which device should the technician add?

Accepted Answer

Switch. A switch is the correct device because it operates at Layer 2 of the OSI model, forwarding Ethernet frames based on MAC addresses, and can connect multiple devices while keeping them in the same broadcast domain. With four router ports already in use, adding a switch allows the 12 wired devices to share a single LAN segment and receive IP addresses from the router's DHCP server, as the switch transparently forwards DHCP broadcast traffic.

Answer

Hub

Answer

Access point

Answer

Modem

Question 6

A company hosts its e-commerce web application on a public cloud IaaS platform. The application experiences unpredictable traffic spikes throughout the day. The cloud platform is configured to automatically add virtual machines when the average CPU utilization exceeds 80% and to remove virtual machines when utilization drops below 30%. The IT team does not need to manually approve these additions or removals. Which of the following essential cloud characteristics does this scenario BEST demonstrate?

Accepted Answer

Rapid elasticity. The scenario describes automatic scaling of virtual machines in response to CPU utilization thresholds, with no manual intervention required. This directly demonstrates rapid elasticity, which is the ability to quickly scale resources up or down to meet demand, often automatically. The unpredictable traffic spikes and the automatic addition/removal of VMs are the hallmark of this essential cloud characteristic.

Answer

Metered service

Answer

Resource pooling

Answer

On-demand self-service

Question 7

A company hosts a critical database on a virtual machine (VM) in a public cloud. The database uses a persistent block storage volume. The IT team needs to move the database to a new VM with more vCPUs and RAM in a different availability zone within the same region. The cloud provider does not support live migration across availability zones. Which of the following procedures will achieve the migration with the LEAST amount of downtime?

Accepted Answer

Detach the block storage volume, create a snapshot, launch a new VM in the target availability zone, create a new volume from the snapshot, and attach it to the new VM.. Option B is correct because detaching the persistent block storage volume, creating a snapshot, launching a new VM in the target availability zone, and creating a new volume from the snapshot minimizes downtime. The database data remains intact on the detached volume, and the snapshot captures a point-in-time state, allowing the new VM to be provisioned and the volume reattached quickly. This approach avoids the overhead of exporting/importing the entire VM and does not rely on unsupported live migration or complex replication setups.

Answer

Export the current VM as a virtual appliance, import it in the target availability zone, and assign the existing static IP to the new VM.

Answer

Use a third-party live migration tool that supports cross-zone VM migration without downtime.

Answer

Set up database replication between the current VM and a new VM in the target zone, then fail over abruptly.

Question 8

A desktop computer shuts down unexpectedly after running for about 20 minutes. The technician has already verified that the CPU temperature is normal (35°C idle), replaced the thermal paste, confirmed all fans are spinning, and tested the power supply with a multimeter (all voltages within specification). The system still shuts down. Which of the following should the technician check NEXT?

Accepted Answer

Check for bulging capacitors on the motherboard.. The technician has already verified CPU temperature, thermal paste, fan operation, and power supply voltages. The fact that the system shuts down after a consistent 20-minute runtime points to a hardware failure that manifests under thermal load, not at idle. Bulging or leaking capacitors on the motherboard are a classic cause of intermittent shutdowns because they lose capacitance as they heat up, leading to voltage ripple and instability. This is the most logical next check before replacing the motherboard or other components.

Answer

Replace the motherboard.

Answer

Update the BIOS firmware.

Answer

Replace the RAM modules.

Question 9

A company decides to migrate its on-premises customer relationship management (CRM) software to the cloud. They want to avoid managing the underlying servers, operating systems, and runtime environments. They also want to focus only on configuring the CRM application to meet their business needs. Which cloud service model should they choose?

Accepted Answer

Software as a Service (SaaS). Option C (SaaS) is correct because the company wants to avoid managing servers, operating systems, and runtime environments, and only configure the CRM application. SaaS delivers a fully managed application over the internet, where the provider handles all underlying infrastructure, platform, and software maintenance, aligning perfectly with the requirement to focus solely on business configuration.

Answer

Infrastructure as a Service (IaaS)

Answer

Platform as a Service (PaaS)

Answer

Desktop as a Service (DaaS)

Question 10

A company needs to move a virtual machine (VM) from one physical host to another in the same datacenter. The VM must remain accessible via its current private IP address, and downtime must be kept to an absolute minimum. Which cloud feature BEST enables this migration?

Accepted Answer

Live migration. Live migration (also known as vMotion in VMware environments) allows a running virtual machine to be moved from one physical host to another with zero downtime and without changing its network identity. The VM's memory and CPU state are transferred over a dedicated network while the disk storage remains shared, ensuring the private IP address remains accessible throughout the process.

Answer

Load balancing

Answer

Auto-scaling

Answer

Elasticity

Question 11

A company hosts a database virtual machine in a public IaaS cloud. The VM is experiencing slow performance due to high disk I/O latency. The administrator wants to improve performance without changing the VM size (vCPU or RAM). Which of the following actions would MOST likely resolve the issue?

Accepted Answer

Migrate the VM to a storage tier with higher IOPS. Migrating the VM to a storage tier with higher IOPS directly addresses the high disk I/O latency by providing faster data access at the storage layer. Since the VM size (vCPU/RAM) remains unchanged, improving the underlying storage performance is the most effective way to reduce latency without altering compute resources.

Answer

Increase the amount of RAM allocated to the VM

Answer

Add more vCPUs to the VM

Answer

Enable nested virtualization on the host

Question 12

A company hosts its e-commerce website on a public cloud IaaS platform. During a flash sale, traffic spikes to 10 times the normal volume. The cloud platform automatically provisions additional virtual servers to handle the increased load and then deprovisions them after the sale ends, requiring no manual intervention. Which essential cloud characteristic does this scenario BEST demonstrate?

Accepted Answer

Rapid elasticity. The scenario describes the cloud platform automatically scaling virtual server resources up and down in response to demand spikes, with no manual intervention. This is the defining characteristic of rapid elasticity, which allows resources to be provisioned and released elastically, often automatically, to match workload fluctuations. The key is the dynamic scaling triggered by traffic changes, not the mere presence of redundancy or distribution.

Answer

High availability

Answer

Fault tolerance

Answer

Load balancing

Question 13

A company is migrating its on-premises infrastructure to a cloud provider. The IT team needs full control over the operating system, the ability to install custom applications, and the ability to configure network settings such as firewalls and subnets. They want to avoid managing the physical hardware. 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, the ability to install custom applications, and the ability to configure network settings such as firewalls and subnets, while the cloud provider manages the physical hardware. This model abstracts the underlying hardware but exposes the virtual infrastructure, meeting all stated requirements.

Answer

Software as a Service (SaaS)

Answer

Platform as a Service (PaaS)

Answer

Desktop as a Service (DaaS)

Question 14

A company runs a critical database application on a virtual machine (VM) hosted on a Type 1 hypervisor. During peak hours, other VMs on the same host consume large amounts of CPU and memory, causing the database VM to experience performance degradation. The administrator wants to guarantee that the database VM always receives at least 4 GB of RAM and 2 vCPUs of processing power, regardless of demand from other VMs. Which virtualization feature should the administrator configure?

Accepted Answer

Resource reservation. Resource reservation guarantees a minimum amount of CPU and memory resources to a specific VM, ensuring that the database VM always has at least 4 GB of RAM and 2 vCPUs available even when other VMs on the same Type 1 hypervisor are under heavy load. This feature prevents performance degradation by locking those resources for the reserved VM, regardless of demand from other guests.

Answer

Resource pooling

Answer

Elasticity

Answer

Thin provisioning

Question 15

A company runs a web application on a virtual machine in a public cloud. During a marketing campaign, the application experiences a sudden spike in traffic. The cloud platform automatically adds more virtual server instances to handle the load and then removes them when traffic subsides. Which cloud computing characteristic does this represent?

Accepted Answer

Rapid elasticity. Rapid elasticity is the cloud characteristic that enables resources to scale out (add instances) and scale in (remove instances) automatically in response to demand spikes, such as during a marketing campaign. This is distinct from resource pooling, which refers to multi-tenant sharing of physical infrastructure, not dynamic scaling.

Answer

Resource pooling

Answer

Measured service

Answer

On-demand self-service