FC0-U71 Practice Exam 3 — 20 Questions

Question 1

A technician installs a new network printer. It can communicate with other computers on the same network but no one outside the network can access it. What is the MOST likely cause?

Accepted Answer

Firewall blocking external traffic. A firewall is designed to control incoming and outgoing network traffic based on predetermined security rules. If the printer can communicate locally but not with external networks, the most likely cause is that the firewall is blocking inbound traffic from outside the local subnet, preventing external devices from reaching the printer's IP address or port.

Answer

Incorrect printer driver

Answer

No IP address configured

Answer

Faulty Ethernet cable

Question 2

A user reports that a spreadsheet application crashes every time they try to open a specific file. The file was created in a newer version of the software. What is the most likely cause?

Accepted Answer

The file was saved in a format incompatible with the installed version.. The most likely cause of a crash when opening a file created in a newer version of the software is a format incompatibility. Newer versions often use updated file formats (e.g., .xlsx vs. .xls in Excel) that older versions cannot parse correctly, leading to application instability or crashes. This is a common scenario in backward compatibility issues, where the installed software lacks the necessary codecs or schema to interpret the file's structure.

Answer

The computer does not have enough RAM.

Answer

The file is corrupted.

Answer

The user does not have permission to access the file.

Question 3

Drag and drop the steps to check for Windows Updates in Windows 10 into the correct order.

Accepted Answer

Step 1: Open the Start menu. Step 2: Select Settings (gear icon). Step 3: Select Update & Security. Step 4: Select Check for updates.. The correct sequence for checking Windows Updates in Windows 10 is: Open the Start menu, then select Settings (gear icon), then select Update & Security, and finally click Check for updates. This ensures you navigate through the proper system settings to initiate a manual update check, keeping your system secure and up to date.

Answer

Step 1: Open the Start menu. Step 2: Select Check for updates. Step 3: Select Settings (gear icon). Step 4: Select Update & Security.

Answer

Step 1: Select Settings (gear icon). Step 2: Open the Start menu. Step 3: Select Update & Security. Step 4: Select Check for updates.

Answer

Step 1: Open the Start menu. Step 2: Select Update & Security. Step 3: Select Settings (gear icon). Step 4: Select Check for updates.

Question 4

A server has four hard drives configured in RAID 5. One drive fails. What must the technician do to restore full redundancy?

Accepted Answer

Replace the failed drive and rebuild the array. RAID 5 uses distributed parity across all drives, allowing the array to tolerate a single drive failure without data loss. When a drive fails, the technician must replace the failed drive and then rebuild the array, during which the RAID controller reconstructs the missing data from the parity information on the remaining drives. This restores full redundancy by returning the array to a fault-tolerant state.

Answer

Replace all drives and reconfigure RAID

Answer

Simply replace the drive with a larger capacity drive

Answer

Replace the failed drive and restore from backup

Question 5

A graphic designer needs a component to accelerate rendering of 3D models. Which of the following computer hardware components is specifically designed for this purpose?

Accepted Answer

GPU. A GPU (Graphics Processing Unit) is purpose-built with thousands of parallel shader cores optimized for the matrix and vector math used in 3D rendering, making it the correct component to accelerate model rendering. CPUs can render 3D graphics but far more slowly because they have fewer, more general-purpose cores. RAM and SSDs affect capacity and load times, not rendering throughput.

Answer

RAM

Answer

SSD

Answer

CPU

Question 6

A user wants to upgrade their workstation's storage without losing existing data. Which of the following is the BEST method?

Accepted Answer

Clone the existing drive to the new one. Cloning the existing drive to the new one creates an exact bit-for-bit copy of the original drive, including the operating system, applications, settings, and all data. This allows the user to simply swap the drives and boot normally without any data loss or reinstallation. It is the most direct method that preserves the existing environment intact.

Answer

Perform a clean installation on the new drive

Answer

Back up data to external drive, then restore

Answer

Set up a RAID 1 array

Question 7

Which of the following character encodings can represent characters from virtually all written languages?

Accepted Answer

Unicode/UTF-8. Unicode (UTF-8) is variable-width and supports all languages.

Answer

EBCDIC

Answer

Extended ASCII

Answer

ASCII

Question 8

A programmer needs to store a true/false value. Which data type is most appropriate?

Accepted Answer

Boolean. A Boolean data type is specifically designed to store true/false values, representing binary logic states. In most programming languages, including Python, Java, and C++, a Boolean variable can only hold one of two values: true or false, making it the most appropriate choice for this requirement.

Answer

Integer

Answer

String

Answer

Float

Question 9

Which of the following file extensions is associated with a compressed archive file?

Accepted Answer

.zip. .zip is a common compressed archive format.

Answer

.exe

Answer

.jpg

Answer

.docx

Question 10

A company requires all employees to use a smart card and a PIN to access the building. This is an example of which concept?

Accepted Answer

Multi-factor authentication. Multi-factor authentication combines something you have (smart card) and something you know (PIN).

Answer

Authorization

Answer

Biometrics

Answer

Single sign-on

Question 11

A developer is debugging a program that is producing incorrect output. Which of the following are common debugging techniques? (Choose three.)

Accepted Answer

Using a debugger. Using a debugger (A) is a core debugging technique because it lets the developer set breakpoints, step through execution line by line, inspect variables and the call stack, and observe the program's state at the exact point where output diverges from expectations. Code review (B) is also a common debugging technique: a careful reading of the source, often by a second developer, can reveal logic errors, off-by-one mistakes, incorrect conditionals, or misuse of APIs that cause incorrect output. Adding print statements (C) is a classic and widely used technique, inserting temporary logging at key points to trace variable values and control flow and thereby localize the faulty logic. Reinstalling the operating system (D) is not a debugging technique for a program producing wrong output; it is a drastic system-recovery action that would not address a logic or coding defect. Changing the program requirements (E) is not debugging either, since debugging means finding and fixing the defect in the code, not redefining what the program is supposed to do.

Answer

Reinstalling the operating system

Answer

Changing the program requirements

Question 12

An organization is implementing a new payroll system. Before final deployment, a group of actual payroll employees test the system to ensure it meets their business needs and processes payroll correctly. Which testing phase is this?

Accepted Answer

User acceptance testing. User acceptance testing (UAT) is the phase where actual end users—in this case, payroll employees—validate that the system meets real business requirements and performs its intended function (processing payroll correctly) before going live. Because the testers are the people who will actually use the system in production, their validation confirms fitness for purpose rather than just technical correctness.

Answer

Unit testing

Answer

System testing

Answer

Integration testing

Question 13

Based on the exhibit, what is the most likely cause of the error?

Accepted Answer

Disk error. The exhibit shows a 'Disk Boot Failure' or similar error, which indicates the system cannot find a valid boot sector on the hard drive. This is most commonly caused by a disk error, such as a corrupted master boot record (MBR), bad sectors, or a disconnected data cable. Option D is correct because the error message directly points to a storage device issue, not a network, power, or memory problem.

Answer

Network outage

Answer

Power supply failure

Answer

Bad memory stick

Question 14

A technician needs to identify a network interface on a device. Which notational system is most commonly associated with MAC addresses?

Accepted Answer

Hexadecimal. MAC addresses are 48-bit identifiers typically written as six groups of two hexadecimal digits separated by colons or hyphens (e.g., 00:1A:2B:3C:4D:5E). Hexadecimal is the notational system most commonly associated with MAC addresses because each byte maps cleanly to two hex digits, making the address compact and readable. This is why network tools, ipconfig/ifconfig output, and switch ARP tables all display MAC addresses in hex.

Answer

Binary

Answer

Octal

Answer

Decimal

Question 15

A developer is creating a cloud-based application that needs to authenticate third-party services before allowing access to its API. The developer decides to use a method where each third-party service receives a unique key that must be included in each API request. This method is known as:

Accepted Answer

API key authentication. API key authentication issues a unique key to each third-party service, which is then included in every API request (typically in a header or query string) so the server can identify and authorize the caller. This matches the scenario exactly: unique keys per consumer, presented on each request. It is a lightweight, stateless credential mechanism distinct from user-session or delegated-authorization models.

Answer

Session-based authentication

Answer

Basic authentication

Answer

OAuth

Question 16

A small business has a single server running Windows Server 2019 that acts as a domain controller, file server, and DHCP server. The server has a single network interface with IP address 192.168.1.10/24. The office has 30 client computers running Windows 10. All clients obtain IP addresses automatically. The network uses a single unmanaged switch. The internet connection is provided by a cable modem with IP 192.168.1.1. The server is configured with a static IP of 192.168.1.10, and the DHCP scope is 192.168.1.100-192.168.1.200. Recently, users have reported that they cannot access the internet. The technician checks that the cable modem is online and that the server can ping the modem. The technician runs 'ipconfig /all' on a client and sees: IP: 192.168.1.101, Subnet: 255.255.255.0, Default Gateway: 192.168.1.10, DNS: 192.168.1.10. The client can ping the server (192.168.1.10) but cannot ping the modem (192.168.1.1). What is the most likely cause?

Accepted Answer

Change the DHCP scope option for the default gateway to 192.168.1.1. The DHCP scope is configured with the default gateway option set to 192.168.1.10 (the server's IP), but the actual default gateway for internet access is the cable modem at 192.168.1.1. Since clients receive their gateway via DHCP, they are sending all off-subnet traffic to the server, which is not configured to route to the internet. Changing the DHCP scope option for the default gateway to 192.168.1.1 will allow clients to route internet traffic through the modem.

Answer

Disable the Windows Firewall on the server to allow traffic

Answer

Replace the cable modem as it is not routing traffic correctly

Answer

Configure the DNS server to forward queries to 8.8.8.8

Question 17

A computer has 8 GB of RAM. If the operating system and applications are using 3.2 GB, how much RAM is available for other processes?

Accepted Answer

4.8 GB. Available RAM is total RAM minus RAM in use: 8 GB − 3.2 GB = 4.8 GB. This is a straightforward subtraction problem testing basic memory capacity arithmetic.

Answer

11.2 GB

Answer

5.8 GB

Answer

3.2 GB

Question 18

Which coding best practice improves code readability and maintainability?

Accepted Answer

Using meaningful variable names. Using meaningful variable names (option B) is a core coding best practice because it makes the code self-documenting, allowing other developers (or the original author after time) to quickly understand the purpose of each variable without needing extensive comments. This directly improves both readability and maintainability, as changes can be made with lower risk of misinterpretation. In contrast, practices like using global variables or hard-coding values obscure logic and create dependencies that are difficult to manage.

Answer

Using global variables for all data

Answer

Hard-coding values whenever possible

Answer

Writing long, single functions

Question 19

During a sprint retrospective, the team identifies that too many bugs are being discovered late in the development cycle. They decide to introduce a practice where developers write tests for individual functions before coding the functions themselves. This approach is an example of:

Accepted Answer

Unit testing. Writing tests for individual functions before writing the functions themselves is the definition of unit testing, and doing so before coding is specifically test-driven development (TDD). Unit tests isolate the smallest testable pieces of code (functions, methods) to verify correctness. This matches the scenario's focus on individual functions and early bug detection.

Answer

User acceptance testing

Answer

Integration testing

Answer

System testing

Question 20

A developer is working on a collaborative software project and uses Git for version control. The developer creates a new feature on a separate branch. After completing the feature, what is the typical next step to integrate the changes into the main branch?

Accepted Answer

Merge the feature branch into the main branch. After completing work on a feature branch, the typical next step is to merge the feature branch into the main branch to integrate the changes. This is the standard Git workflow: create a branch, commit changes, then merge back into the mainline (often via a pull request). Merging combines the histories and brings the feature into the main branch.

Answer

Commit the changes directly to the main branch

Answer

Delete the feature branch without merging

Answer

Push the branch to the remote repository