FC0-U71 Infrastructure Practice Test 5 — 15 Questions

Question 1

Which device converts the signal from an ISP into a digital signal that a computer can use?

Accepted Answer

Modem. A modem (modulator-demodulator) converts the ISP's signal — whether analog (DSL, cable, POTS) or optical (fiber ONT) — into a digital signal that a computer or router can use. It is the demarcation device between the ISP's WAN medium and the customer's LAN. This matches the question's definition exactly.

Answer

Switch

Answer

Access point

Answer

Router

Question 2

Which of the following is an input device?

Accepted Answer

Keyboard. A keyboard is an input device because it sends data (keystrokes) into the computer for processing. Input devices convert human actions into signals the system can interpret, and the keyboard is the canonical example. Monitors, printers, and speakers all receive output from the computer rather than sending data in.

Answer

Monitor

Answer

Printer

Answer

Speaker

Question 3

A network administrator is designing a new office network. Which THREE factors should be considered when choosing between 2.4 GHz and 5 GHz Wi-Fi bands?

Accepted Answer

Speed. Option B (Speed) is correct because the 5 GHz band offers wider channels (up to 80/160 MHz) and higher throughput than the narrower 2.4 GHz channels, making data rate a key decision factor. Option C (Interference) is correct because 2.4 GHz is crowded by overlapping channels, Bluetooth, microwaves, and neighboring APs, while 5 GHz has many more non-overlapping channels and thus less interference. Option E (Range) is correct because 2.4 GHz signals penetrate walls and travel farther due to longer wavelengths, whereas 5 GHz has shorter range, so coverage requirements must guide band selection. Option A (Cellular compatibility) is not a Wi-Fi band selection factor since cellular operates on licensed spectrum independent of 2.4/5 GHz WLAN design. Option D (Number of devices) is not a direct differentiator between the bands, as client capacity depends more on AP density, channel width, and airtime than on the band itself.

Answer

Cellular compatibility

Answer

Number of devices

Question 4

Which of the following storage interfaces provides the fastest data transfer speeds?

Accepted Answer

NVMe M.2. NVMe M.2 is correct because it uses the PCIe bus directly, bypassing the SATA interface and AHCI protocol, which allows much higher throughput and lower latency. Typical NVMe drives reach sequential read speeds of 3,500 MB/s or more on PCIe 3.0 and over 7,000 MB/s on PCIe 4.0, far exceeding SATA III's 600 MB/s ceiling. This makes NVMe M.2 the fastest storage interface among the options for direct-attached storage.

Answer

USB 3.0

Answer

SATA

Answer

Ethernet

Question 5

A user wants to upgrade their desktop computer's RAM for better performance. The motherboard supports dual-channel memory. Which configuration will provide the best performance?

Accepted Answer

Two 8 GB DDR4 modules in paired slots. Dual-channel memory requires matched pairs of identical modules installed in the correct paired slots (often color-coded, e.g., slots 1 and 3 or 2 and 4). Two 8 GB DDR4 modules in paired slots gives 16 GB total with both memory channels active, effectively doubling memory bandwidth compared to single-channel operation. This is the optimal configuration for performance.

Answer

Three 4 GB DDR4 modules

Answer

One 16 GB DDR4 module

Answer

Two 8 GB DDR4 modules in the same channel

Question 6

A technician is troubleshooting a network connectivity issue on a laptop. The laptop connects to the company's wireless network but cannot access the internet. The technician checks the IP configuration and sees an IP address of 169.254.1.5. What is the most likely cause?

Accepted Answer

The DHCP server is unreachable.. An IP address in the 169.254.0.0/16 range is an APIPA (Automatic Private IP Addressing) address, which Windows assigns automatically when a DHCP server cannot be reached to obtain a valid lease. Since the laptop has an APIPA address, it can communicate only on the local link and has no default gateway or DNS, so internet access fails. The most likely cause is that the DHCP server is unreachable — either it is down, the DHCP scope is exhausted, or the client cannot reach it due to a network/VLAN issue.

Answer

The DNS server is down.

Answer

The router is misconfigured.

Answer

The network cable is faulty.

Question 7

Which of the following Wi-Fi standards operates on the 5 GHz band and provides the fastest theoretical speeds?

Accepted Answer

802.11ax. IEEE 802.11ax (marketed as Wi-Fi 6 and Wi-Fi 6E) is the newest standard listed and delivers the fastest theoretical throughput, up to roughly 9.6 Gbps, while operating on both 2.4 GHz and 5 GHz bands (and 6 GHz for Wi-Fi 6E). It introduces OFDMA, MU-MIMO, and 1024-QAM to boost efficiency and speed in dense environments. This makes it the correct answer for 'fastest theoretical speeds on the 5 GHz band.'

Answer

802.11g

Answer

802.11ac

Answer

802.11n

Question 8

A small office has five computers that need to share files and a printer. Which type of network should be set up?

Accepted Answer

LAN. A LAN (Local Area Network) is designed for a single, contained environment such as a small office, home, or single building, and is exactly the right scope for five computers sharing files and a printer. It provides high-speed connectivity over short distances using Ethernet or Wi-Fi, typically through a single switch or router. This matches the requirement of a small, localized group of devices sharing resources.

Answer

PAN

Answer

WAN

Answer

MAN

Question 9

A user reports that their smartphone battery drains quickly and the device feels warm. The user recently installed several apps. Which built-in smartphone feature can help identify the cause?

Accepted Answer

Battery usage monitor. The battery usage monitor built into Android and iOS shows per-app battery consumption and identifies which apps are draining power or causing the device to run warm. Since the user recently installed several apps, this feature directly correlates the symptom to the culprit. It also reports background activity, screen-on time, and CPU usage per app.

Answer

Accelerometer

Answer

GPS

Answer

NFC

Question 10

An IT administrator needs to deploy a virtual machine (VM) on a server that will host multiple operating systems. The administrator wants the VM to have dedicated resources and minimal overhead. Which type of hypervisor should be installed on the server?

Accepted Answer

Type 1 hypervisor. A Type 1 hypervisor runs directly on the host's hardware, providing dedicated resources and minimal overhead because it does not rely on an underlying operating system. This makes it ideal for hosting multiple operating systems with high performance and efficiency. Type 1 hypervisors are also known as bare-metal hypervisors.

Answer

Container engine

Answer

Hosted hypervisor

Answer

Type 2 hypervisor

Question 11

Which of the following is an example of an output device?

Accepted Answer

Monitor. An output device receives processed data from a computer and presents it to the user in a human-readable or usable form. A monitor is a classic output device because it displays visual information such as text, images, and video generated by the computer's GPU. It does not send data into the computer; it only presents data outward to the user.

Answer

Scanner

Answer

Mouse

Answer

Keyboard

Question 12

A company wants to manage and secure employee smartphones used for work. Which technology should they implement?

Accepted Answer

MDM. Mobile Device Management (MDM) is the technology designed to enroll, configure, secure, and remotely manage employee smartphones and tablets. It enforces policies such as passcode requirements, encryption, app whitelisting, and remote wipe. This directly addresses the company's need to manage and secure work devices.

Answer

DNS

Answer

VPN

Answer

NAT

Question 13

A user has a desktop computer with a SATA SSD and wants to upgrade to an NVMe M.2 SSD. The motherboard has an M.2 slot. What must the user verify before purchasing the NVMe drive?

Accepted Answer

The M.2 slot supports NVMe (PCIe).. NVMe M.2 drives use the PCIe interface and require a motherboard that supports NVMe via M.2 slot with PCIe lanes.

Answer

The power supply has enough wattage.

Answer

The operating system is 64-bit.

Answer

The SATA cable is compatible.

Question 14

Which of the following is the primary function of a router in a home network?

Accepted Answer

Connects the home network to the internet. A router's primary function is to connect the home network to the internet by routing packets between the local network and the ISP's network, performing NAT and forwarding traffic based on IP addresses. It is the gateway device that sits at the boundary between the LAN and the WAN. While many home routers also include a switch, wireless AP, and DHCP server, those are secondary functions.

Answer

Converts ISP signal to digital

Answer

Assigns IP addresses to devices

Answer

Provides wireless connectivity only

Question 15

A company is deploying new laptops for employees. The IT department requires that the laptops have fast storage, support for external 4K monitors, and the ability to connect to a wireless network. Which THREE of the following should be included?

Accepted Answer

Wi-Fi 6 (802.11ax). Wi-Fi 6 (802.11ax) (A) is correct because it is a current wireless networking standard that provides the required wireless network connectivity with improved throughput and efficiency. NVMe M.2 SSD (C) is correct because NVMe drives attached via the M.2 interface deliver the fast storage the IT department requires, far exceeding SATA HDD performance. HDMI 2.0 port (D) is correct because HDMI 2.0 supports 4K video output at up to 60 Hz, satisfying the external 4K monitor requirement. SATA HDD (B) is not appropriate because mechanical hard drives are slow and do not meet the fast-storage requirement. Bluetooth 4.0 (E) is not required because the scenario asks for wireless network connectivity, which is provided by Wi-Fi, not Bluetooth, and Bluetooth 4.0 is an older standard.

Answer

SATA HDD

Answer

Bluetooth 4.0