FC0-U71 Practice Test 8 — 10 Questions

Question 1

A technician is troubleshooting a computer that will not power on. Which of the following should be checked FIRST?

Accepted Answer

Whether the power cable is plugged in. The most fundamental requirement for a computer to power on is a stable electrical connection. Checking whether the power cable is plugged in is the first step in the troubleshooting methodology because it eliminates the simplest and most common cause of a no-power condition before moving to more complex diagnostics. Without verifying the power source, any other troubleshooting is premature.

Answer

The network connection

Answer

The operating system version

Answer

The amount of free disk space

Question 2

A developer is working on a new feature and creates a copy of the main codebase to work in isolation. Later, this copy is merged back into the main branch. Which version control concept describes this copy?

Accepted Answer

Branch. A branch is an independent line of development created from a point in the main codebase so a developer can work in isolation without affecting the main line. When the feature is complete, the branch is merged back into the main branch. This matches the scenario exactly: a copy of the codebase used for isolated work that is later integrated.

Answer

Merge

Answer

Commit

Answer

Pull request

Question 3

You are a support technician for a small company. An employee reports that their desktop computer will not turn on. You have verified that the power cable is securely connected to both the computer and the wall outlet. When you press the power button, you hear a faint clicking sound but the computer does not start. The power supply fan does not spin, and there are no lights on the motherboard. You have tested the wall outlet with a known working device and it provides power. What is the most likely cause of the issue?

Accepted Answer

The power supply is faulty.. The symptoms—faint clicking sound, no fan spin, no motherboard lights, and confirmed wall outlet power—strongly indicate a power supply failure. The clicking sound often comes from a relay or overload protection circuit inside the PSU attempting to start but failing due to internal component damage or short circuit. A faulty power supply cannot deliver the necessary voltages (e.g., +3.3V, +5V, +12V) to power the system, explaining the complete lack of activity.

Answer

The CPU is overheated.

Answer

The power button is not connected properly.

Answer

The motherboard has failed.

Question 4

A hospital's IT team manages a virtualized server hosting a patient records database. The server has one physical processor with 6 cores, 32 GB of RAM, and a RAID 5 array of three 1 TB HDDs. The virtual machine (VM) running the database is configured with 2 vCPUs, 8 GB RAM, and a 500 GB virtual disk stored on the RAID array. Users report that database queries are taking much longer than usual. The host server shows CPU utilization at 20%, memory at 60%, and the disk queue length frequently stays above 5. Which of the following is the most likely cause of the performance issue?

Accepted Answer

Disk I/O bottleneck. The disk queue length consistently exceeding 5 indicates that I/O requests are waiting for the storage subsystem, which is a classic sign of a disk I/O bottleneck. The RAID 5 array of three 1 TB HDDs provides limited IOPS compared to SSDs, and the single virtual disk on this array cannot keep up with the database workload. Even though CPU and memory utilization are moderate, the high queue length shows the disks are the limiting factor.

Answer

Network bandwidth limitation

Answer

Insufficient memory

Answer

Insufficient CPU resources

Question 5

A user reports that their computer is running slowly. Which of the following is the MOST likely cause?

Accepted Answer

Running too many applications simultaneously. When too many applications are running simultaneously, the computer's RAM and CPU resources become oversubscribed, forcing the operating system to rely heavily on virtual memory (paging to disk). This causes excessive disk I/O and context switching, which directly degrades system responsiveness and leads to the perception of slowness.

Answer

The monitor is too small

Answer

The keyboard is unresponsive

Answer

The mouse needs batteries

Question 6

A system administrator needs to automatically assign IP addresses to devices on the network. Which protocol should be configured on the server?

Accepted Answer

DHCP. The Dynamic Host Configuration Protocol (DHCP) is the correct protocol because it is specifically designed to automatically assign IP addresses and other network configuration parameters (such as subnet mask, default gateway, and DNS servers) to devices on a network. A DHCP server maintains a pool of available addresses and leases them to clients, eliminating the need for manual static IP configuration.

Answer

DNS

Answer

ICMP

Answer

ARP

Question 7

A small business needs to share files among employees within the same building. Which network topology is most efficient for this scenario?

Accepted Answer

Star. The star topology is most efficient for this scenario because all employee workstations connect to a central switch, which provides dedicated bandwidth per connection and simplifies troubleshooting. In a small office, the star topology allows easy addition or removal of devices without disrupting the network, and the central switch can manage traffic efficiently using MAC address tables.

Answer

Ring

Answer

Bus

Answer

Mesh

Question 8

A web developer wants to identify why a web page is loading slowly. Which built-in browser tool is most appropriate to analyze network requests?

Accepted Answer

Developer Tools. Developer Tools (F12) include a Network tab that captures all HTTP/HTTPS requests made by the page, showing timing details (DNS lookup, TCP handshake, TLS negotiation, time to first byte, content download) and response sizes. This allows the developer to pinpoint slow resources, such as large images, unoptimized scripts, or server delays, making it the correct tool for analyzing network performance.

Answer

Password manager

Answer

Download manager

Answer

Bookmark manager

Question 9

A technician is diagnosing performance issues in a wireless network. Users report intermittent slowdowns. Which of the following is the MOST likely cause?

Accepted Answer

Interference from neighboring networks. Intermittent slowdowns in a wireless network are most commonly caused by co-channel or adjacent-channel interference from neighboring networks. Wi-Fi operates on shared, unlicensed spectrum (2.4 GHz and 5 GHz), and overlapping channels or high utilization from nearby access points force stations to wait for clear channel access, causing latency spikes and throughput drops. WPA2 encryption overhead is negligible for modern hardware, and weak signal or incorrect channel width would typically cause consistent, not intermittent, issues.

Answer

WPA2 encryption overhead

Answer

Weak signal from the access point

Answer

Incorrect channel width setting

Question 10

A developer is writing a program that stores a collection of unique student IDs. The program needs to quickly look up a student by ID and does not require the IDs to be stored in any particular order. Which data structure is most appropriate for this task?

Accepted Answer

Dictionary. A dictionary (hash map) stores key-value pairs and provides average O(1) lookup by key, which is ideal for quickly retrieving a student record by unique ID. Since the IDs are unique and order does not matter, a dictionary's key uniqueness constraint and fast lookup make it the best fit. Arrays and other sequential structures would require O(n) search unless indexed by a contiguous integer range.

Answer

Queue

Answer

Array

Answer

Stack