220-1101 Practice Test 49 — 15 Questions

Question 1

A company runs its customer-facing web application on a public cloud platform. The application experiences dramatic traffic spikes during promotional events. The cloud platform automatically increases the number of virtual server instances during high demand and reduces them when demand subsides. The company only pays for the compute resources consumed during the billing cycle. Which cloud computing characteristic does this configuration BEST exemplify?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Rapid elasticity. The scenario describes the cloud platform automatically scaling virtual server instances up and down in response to traffic spikes, which is the defining characteristic of rapid elasticity. This allows the company to provision and release compute resources dynamically, paying only for what is used, which is a core benefit of cloud computing.

Answer

On-demand self-service

Answer

Resource pooling

Answer

Measured service

Question 2

A company hosts a web application on a public cloud IaaS platform. The application experiences unpredictable traffic spikes. The cloud platform automatically adds virtual machines when CPU usage exceeds 80% and removes them when usage drops below 30%. The IT team does not need to manually approve the additions or removals. Which essential cloud characteristic does this BEST describe?

Accepted Answer

Rapid elasticity. The scenario describes the cloud platform automatically adding and removing virtual machines based on CPU utilization thresholds (80% and 30%) without manual intervention. This is the defining behavior of rapid elasticity, which allows resources to scale out and in automatically to match demand. Unlike on-demand self-service, which focuses on user-initiated provisioning, rapid elasticity emphasizes the system's ability to dynamically adjust capacity without requiring human action.

Answer

On-demand self-service

Answer

Resource pooling

Answer

Measured service

Question 3

A technician configures a new workstation with DHCP. Initially, the workstation obtains an IP address of 192.168.1.100/24 with default gateway 192.168.1.1 and can browse the internet. After approximately 30 minutes, the user reports that internet access stops working, but the workstation can still ping other local devices on the same subnet. The technician runs ipconfig and sees that the workstation now has an IP address of 169.254.15.78. Which of the following is the MOST likely cause?

Accepted Answer

The DHCP lease expired and the workstation could not contact the DHCP server to renew it. The workstation initially received a valid DHCP lease (192.168.1.100/24). After 30 minutes, the lease expired, and the workstation failed to renew it from the DHCP server. As a result, Windows Automatic Private IP Addressing (APIPA) assigned a 169.254.x.x address, which allows local subnet communication but not internet access. This matches the symptom of losing internet while retaining local connectivity.

Answer

The DHCP server has run out of available IP addresses in the scope

Answer

The DNS server address provided by DHCP has become invalid

Answer

The switch port the workstation is connected to was moved to a different VLAN without trunking

Question 4

A company wants to migrate its custom web application to the cloud. The development team needs full administrative access to the operating system, the ability to install custom middleware, and control over security configurations. They want to avoid managing the physical servers, hypervisors, and data center infrastructure. Which cloud service model should the company choose?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the development team full administrative access to the operating system, the ability to install custom middleware, and control over security configurations. The cloud provider manages the physical servers, hypervisors, and data center infrastructure, while the customer retains control over the OS, storage, and deployed applications. This matches the requirement for full OS-level access without managing the underlying hardware.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 5

A technician is troubleshooting a laptop that will not power on. The power adapter's LED is lit when plugged into the wall, but pressing the laptop's power button yields no response—no fans, no LEDs, and no beeps. The technician has already removed the battery and held the power button for 30 seconds to drain residual charge. Which of the following should the technician try NEXT?

Accepted Answer

Use a multimeter to measure the voltage at the tip of the power adapter.. The power adapter's LED is lit, indicating the wall outlet is supplying power, but the laptop shows no signs of life. The next logical step is to verify that the adapter is actually delivering the correct voltage to the laptop's power jack. Using a multimeter to measure the voltage at the tip of the adapter confirms whether the adapter itself is faulty, which is a common failure point before moving to internal components.

Answer

Remove the RAM modules and reseat them one at a time.

Answer

Replace the laptop's internal battery with a known-good battery.

Answer

Inspect the DC power jack on the laptop for physical damage.

Question 6

A web application hosted on a public cloud platform automatically adds virtual server instances during high traffic and removes them during low traffic, without requiring manual intervention. This is an example of which cloud computing characteristic?

Accepted Answer

Rapid elasticity. The scenario describes a web application that automatically scales virtual server instances up and down based on traffic demand, which is the defining characteristic of rapid elasticity. This cloud computing feature allows resources to be provisioned and released elastically, often automatically, to match workload fluctuations. The key here is the automatic scaling without manual intervention, which distinguishes rapid elasticity from other characteristics like on-demand self-service, which focuses on user-initiated provisioning.

Answer

On-demand self-service

Answer

Broad network access

Answer

Measured service

Question 7

A company hosts a critical database server on-premises. They want to migrate to a cloud solution that allows them to retain full administrative control over the operating system, database software, and security patches, but they do not want to manage the physical server hardware, rack space, or network cabling. Which cloud service model should they choose?

Accepted Answer

IaaS. IaaS (Infrastructure as a Service) is the correct choice because it provides virtualized computing resources over the internet, including virtual machines, storage, and networking. The customer retains full administrative control over the operating system, database software, and security patches, while the cloud provider manages the physical server hardware, rack space, and network cabling. This matches the requirement of full OS and application control without physical infrastructure management.

Answer

PaaS

Answer

SaaS

Answer

DaaS

Question 8

A company runs a private cloud for its internal applications. During peak business hours, the IT team notices that some virtual machines (VMs) become slow due to high CPU and memory demand. The team wants the cloud infrastructure to automatically increase resources to the VMs when demand spikes and reduce them when demand drops, without manual intervention. Which cloud computing characteristic BEST describes this capability?

Accepted Answer

Rapid elasticity. Rapid elasticity is the cloud characteristic that enables automatic, seamless scaling of resources (such as CPU and memory) up or down in response to demand spikes or drops, without manual intervention. In this scenario, the private cloud infrastructure must dynamically allocate additional compute capacity to VMs during peak hours and reduce it when demand subsides, which is the precise definition of rapid elasticity. This is typically implemented through orchestration tools like VMware vSphere DRS or OpenStack Heat, which monitor utilization metrics and trigger scaling actions via APIs.

Answer

Resource pooling

Answer

Measured service

Answer

On-demand self-service

Question 9

A technician is upgrading a desktop computer with a new high-end graphics card. The power supply unit (PSU) is rated at 500W. The new graphics card requires two 8-pin PCIe power connectors. The PSU has one 6+2 pin PCIe connector and one 6-pin PCIe connector. The technician uses a 6-pin to 8-pin power adapter to convert the 6-pin connector to an 8-pin. When the computer is powered on, the fans spin briefly, then the system shuts down immediately. What is the most likely cause?

Accepted Answer

The 6-pin PCIe connector cannot provide the required power to the graphics card, even with a 6-pin to 8-pin adapter.. The most likely cause is that the 6-pin PCIe connector, even with a 6-pin to 8-pin adapter, cannot deliver the required power for the high-end graphics card. A 6-pin connector is rated for 75W, while an 8-pin connector is rated for 150W. The adapter does not increase the power delivery capacity; it only changes the physical shape. When the graphics card attempts to draw more power than the 6-pin rail can supply, the PSU's overcurrent protection (OCP) trips, causing an immediate shutdown. This is consistent with the symptom: fans spin briefly then system powers off.

Answer

The graphics card is not receiving enough power from the PCIe slot itself.

Answer

The power supply's total wattage is insufficient to power the graphics card.

Answer

The motherboard's BIOS does not support the new graphics card.

Question 10

A technician is setting up a small office network with a router that has integrated DHCP and a 24-port unmanaged switch. All computers are connected to the switch. Users report that they can access the internet but cannot see each other in Network Neighborhood. The technician checks and finds that all computers have IP addresses in the 192.168.1.0/24 range but with different subnet masks: some have 255.255.255.0, others have 255.255.0.0. Which of the following is the most likely cause?

Accepted Answer

The DHCP server is not assigning the correct subnet mask.. The DHCP server is configured to hand out IP addresses in the 192.168.1.0/24 range, but it is assigning inconsistent subnet masks (some /24, some /16). This causes computers with different subnet masks to calculate different network portions of their IP addresses, preventing them from seeing each other in Network Neighborhood even though they can reach the internet through the router's default gateway.

Answer

The switch is not forwarding broadcasts.

Answer

The router's firewall is blocking local traffic.

Answer

The computers are using different default gateways.

Question 11

A user's Android smartphone is running hot to the touch and the battery drains significantly faster than usual, even when the phone is idle. The technician checks the battery health using a diagnostic app, which reports it as 'Good'. The user has not installed any new apps recently. Which of the following is the MOST likely cause of the issue?

Accepted Answer

A background application or system process is consuming excessive CPU resources.. A background application or system process consuming excessive CPU resources is the most likely cause because high CPU usage generates heat and drains the battery rapidly, even when the phone is idle. The diagnostic app reporting battery health as 'Good' rules out a failing battery, and the absence of new app installations suggests a rogue system process or an existing app misbehaving. Android's process management can allow apps to run background services that spike CPU usage without user awareness, leading to thermal and power symptoms.

Answer

The charging port is shorted, causing continuous power draw.

Answer

The power button is stuck in the pressed position, keeping the screen on.

Answer

The device has been infected with malware that mines cryptocurrency.

Question 12

A network laser printer prints garbled pages when receiving print jobs from one specific user's computer, but prints correctly from all other computers on the same network. The printer has a static IP address and is connected via an unmanaged switch. The technician can ping the printer from the affected computer without any packet loss. Which of the following is the MOST likely cause?

Accepted Answer

The printer driver on the affected computer is corrupted. The printer prints garbled pages only from one specific computer, while other computers on the same network print correctly. This points to a local software issue on that computer rather than a network or printer hardware problem. A corrupted printer driver can cause the print data to be encoded incorrectly, resulting in garbled output, even though network connectivity (ping) is fine.

Answer

The network cable from the affected computer to the switch is faulty

Answer

The print spooler service on the affected computer is stopped

Answer

The USB port on the motherboard of the affected computer is malfunctioning

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

Answer

Thin provisioning

Answer

Live migration

Question 14

A technician is troubleshooting a workstation that lost network connectivity after a lightning storm. The workstation's Ethernet link light on both the NIC and the switch port is solid, but the workstation cannot access any network resources. The technician can ping 127.0.0.1 successfully. When pinging the default gateway (192.168.1.1), the request times out. The technician connects a known-good laptop to the same switch port and cable, and the laptop accesses the network normally. Which of the following is the MOST likely cause?

Accepted Answer

The lightning storm damaged the NIC, causing it to fail at the data link layer while maintaining a physical link.. The solid link light indicates a physical layer (Layer 1) connection is established, and the successful ping to 127.0.0.1 confirms the TCP/IP stack is functioning. However, the inability to ping the default gateway, combined with a known-good laptop working on the same port and cable, isolates the fault to the workstation's NIC. The most likely cause is that the lightning storm damaged the NIC at the data link layer (Layer 2), allowing link pulses (Layer 1) to pass but corrupting frame processing, which prevents successful ARP and IP communication.

Answer

The workstation's IP address is statically configured with an incorrect subnet mask.

Answer

The switch port is configured with the incorrect VLAN, but the link light remains on because the switch port is up.

Answer

The workstation's network cable is faulty and only passes link pulses but not data frames.

Question 15

A technician is installing additional RAM into a desktop computer. After installation, the computer powers on but emits a series of long beeps and does not display any video. The technician verifies that the new RAM module is the correct type (DDR4) for the motherboard and that it is listed on the motherboard's QVL. Which of the following is the MOST likely cause of the beep code?

Accepted Answer

The RAM module is not fully seated in the DIMM slot. The series of long beeps is a standard BIOS POST (Power-On Self-Test) code indicating a memory error. The most common cause after installing RAM is that the module is not fully seated in the DIMM slot, causing poor electrical contact. Even if the RAM is the correct type and on the QVL, an incomplete insertion will prevent the system from initializing memory and displaying video.

Answer

The RAM frequency is too high for the CPU's memory controller

Answer

The RAM module is installed in the wrong memory channel

Answer

The RAM voltage is set too low in the BIOS