CompTIA Tech+ (FC0-U71) FC0-U71 Questions 301–375 | Page 5/14

301

Multi-Selecthard

A company is evaluating different software licenses for a new project. Which THREE of the following are characteristics of open-source licenses such as the MIT License or Apache License? (Select THREE.)

Select 3 answers

A.Users must keep their modifications private.

B.Users must pay a fee to use the software.

C.Users can modify the source code.

D.Users can distribute the software.

E.Users can use the software for any purpose.

AnswersC, D, E

Open-source licences grant access to source code and permit modification, enabling derivative works. This satisfies the stem's requirement for a characteristic of MIT or Apache licensing, since the freedom to modify is fundamental to the open-source definition.

Why this answer

Option C is correct because open-source licenses such as MIT and Apache explicitly grant the right to modify the source code, which is a core requirement of the Open Source Initiative definition. Option D is correct because these licenses permit redistribution of the software, including in original or modified form, subject only to attribution or notice requirements. Option E is correct because open-source licenses grant freedom of use for any purpose, including commercial use, without field-of-use restrictions.

Option A is incorrect because open-source licenses do not require modifications to be kept private; in fact, they permit and often encourage public distribution of modified versions. Option B is incorrect because MIT and Apache licenses are royalty-free and do not require payment of a fee to use the software.

Exam trap

The trap here is confusing open-source freedoms with proprietary restrictions—candidates may incorrectly assume that 'open' means limited rights or that fees are required, when in fact the OSI definition mandates free use, modification, and redistribution.

Full explanation →

302

MCQeasy

A home user has a laptop with an integrated webcam that no longer works after a recent driver update. The user needs a quick, low-cost replacement for video calls. Which of the following should the technician recommend?

A.A KVM switch

B.A USB webcam

C.A PCIe video capture card

D.A Thunderbolt docking station

AnswerB

A USB webcam is an external peripheral that connects through the USB port and provides immediate video capture without opening the laptop, which is ideal for a quick, low-cost replacement. It bypasses the failed integrated webcam entirely and usually works with built-in operating system drivers, so the user can resume video calls with minimal setup.

Why this answer

An external USB webcam is the simplest and least expensive way to restore video calling when an integrated camera fails. It connects to an available USB port, is recognized by common operating systems, and does not require disassembly or specialized drivers. The other options either do not provide a camera or are intended for different purposes entirely.

Exam trap

The trap here is confusing video capture or docking hardware with a camera, when only a device with an integrated image sensor can replace a broken webcam.

Full explanation →

303

MCQmedium

A database designer is creating a table to store employee information. To ensure that each employee can be uniquely identified, which constraint should be applied?

A.UNIQUE

B.FOREIGN KEY

C.PRIMARY KEY

D.NOT NULL

AnswerC

A PRIMARY KEY enforces uniqueness and implicitly rejects NULLs, guaranteeing every employee row has a distinct identifier. This directly satisfies the stem's requirement that each employee be uniquely identified, unlike UNIQUE alone, which permits NULLs and therefore cannot guarantee identification.

Why this answer

A PRIMARY KEY constraint uniquely identifies each record in a database table. It enforces both uniqueness and non-nullability, ensuring that no two employees can have the same primary key value and that the value is never NULL. This makes it the correct choice for guaranteeing each employee can be uniquely identified.

Exam trap

The trap here is that candidates often confuse UNIQUE with PRIMARY KEY, not realizing that UNIQUE allows a NULL value (which cannot serve as a guaranteed identifier) and that PRIMARY KEY inherently includes both uniqueness and non-nullability.

How to eliminate wrong answers

Option A is wrong because a UNIQUE constraint ensures all values in a column are distinct but allows a single NULL value, which would break the requirement for a guaranteed unique identifier for every employee. Option B is wrong because a FOREIGN KEY constraint enforces referential integrity between two tables and does not provide unique identification within the table itself. Option D is wrong because a NOT NULL constraint only prevents NULL values in a column but does not enforce uniqueness, so duplicate employee identifiers would still be allowed.

Full explanation →

304

MCQmedium

Which type of malware is disguised as legitimate software but performs malicious actions?

A.Virus

B.Ransomware

C.Trojan

D.Worm

AnswerC

A Trojan masquerades as legitimate software, so users install it willingly, satisfying the disguise requirement. Unlike viruses or worms, it does not self-replicate; its payload executes through user action, such as running the installer. This matches the stem's constraint of apparent legitimacy concealing malicious behaviour.

Why this answer

A Trojan horse appears useful but contains harmful code, unlike viruses or worms that self-replicate.

Full explanation →

305

MCQmedium

A database administrator adds an index on the 'Email' column of a 'Users' table. What is a likely consequence?

A.Reduced storage space

B.Improved query performance for all queries

C.Slower update operations on the table

D.Faster inserts on the table

AnswerC

An index on Email accelerates lookups and joins on that column, but every INSERT, UPDATE or DELETE touching Email must also maintain the index structure. That extra write overhead makes update operations on the Users table slower.

Why this answer

Adding an index on the 'Email' column improves the speed of SELECT queries that filter or sort by that column, but it introduces overhead on write operations. Every time a row is inserted, updated, or deleted, the database must also update the index structure (e.g., a B-tree). This additional work makes UPDATE operations slower, which is why option C is correct.

Exam trap

The trap here is that candidates assume indexes universally speed up all database operations, ignoring the write-performance penalty that occurs because the index must be maintained on every INSERT, UPDATE, and DELETE.

How to eliminate wrong answers

Option A is wrong because an index consumes additional storage space, not less; it stores a separate data structure (e.g., a B-tree) that maps index keys to row locations. Option B is wrong because an index only improves query performance for queries that use the indexed column in WHERE, JOIN, or ORDER BY clauses; queries that do not reference the 'Email' column or that perform full-table scans may see no benefit or even degraded performance. Option D is wrong because inserts become slower, not faster, due to the need to maintain the index by inserting a new entry into the index structure for each new row.

Full explanation →

306

Multi-Selectmedium

A team is choosing a version control workflow for a project with multiple developers. They want changes to be tracked, reviewed, and integrated safely. Which TWO practices are characteristic of using a distributed version control system such as Git? (Choose two.)

Select 2 answers

A.File locking prevents two developers from editing the same file at the same time

B.Each developer has a full local copy of the repository, including its history

C.Every commit is automatically deployed to production without any review

D.The repository exists only on a single central server, and developers must be online to commit

E.Changes are proposed for review through a pull request before being merged into the main branch

AnswersB, E

In a distributed version control system, cloning a repository copies the complete history to the developer's machine. This allows commits, branching, and history inspection to happen locally without a network connection. It is a defining characteristic of distributed systems and supports the team's need to track changes independently before sharing them.

Why this answer

Distributed version control gives every developer a complete local repository with full history, enabling offline commits and branching, while collaborative platforms add pull requests so changes can be reviewed before merging. A single central server with mandatory connectivity describes a centralized model, file locking conflicts with parallel work, and automatic unreviewed deployment contradicts the goal of safe integration.

Exam trap

The trap here is assuming any repository hosted on a server is centralized, when a distributed system can still use a shared remote while each developer keeps a full local copy.

Full explanation →

307

MCQmedium

A user notices that their computer runs slowly when multiple applications are open simultaneously. Which hardware component is most likely insufficient for the current workload?

A.GPU

B.CPU

C.Hard drive

D.RAM

AnswerD

Running many applications concurrently consumes memory for each process's working set. When RAM is exhausted, the system pages to disk, causing the slowdown described. Insufficient RAM is therefore the bottleneck for this simultaneous multi-application workload.

Why this answer

When multiple applications run simultaneously, each active process and its working data must reside in memory for the CPU to access it quickly. If RAM is insufficient, the OS resorts to paging/swapping to disk, which is orders of magnitude slower and manifests as system-wide sluggishness under multitasking. Adding more RAM directly addresses this bottleneck by allowing more concurrent processes to stay resident in fast memory.

Exam trap

FC0-U71 often tests the distinction between CPU-bound slowness (one app slow) and memory-bound slowness (many apps open), luring candidates toward CPU because 'slow computer' sounds like a processor problem.

How to eliminate wrong answers

Option A is wrong because the GPU primarily accelerates graphics and parallel compute workloads; insufficient GPU power causes poor frame rates or slow rendering, not general multitasking slowdown. Option B is wrong because an inadequate CPU typically causes high CPU utilization and slow individual computations, but the symptom described — slowness specifically when many apps are open — points to memory pressure rather than raw compute. Option C is wrong because a slow hard drive affects boot times and file I/O, but the classic 'slows down with many apps open' pattern is memory exhaustion, not disk throughput.

Full explanation →

308

MCQmedium

Which programming data type would be used to store a value of 'True' or 'False'?

A.String

B.Float

C.Boolean

D.Integer

AnswerC

A Boolean stores exactly two possible states, true or false, matching the stem's 'True' or 'False' value. Other types such as integer, string or float cannot natively represent a binary logical state, so Boolean is the precise fit.

Why this answer

A Boolean data type is specifically designed to hold one of two truth values: True or False. It is named after mathematician George Boole and is fundamental to conditional logic, comparisons, and control flow in programming. Storing 'True' or 'False' in any other type would be semantically incorrect and would lose the type's logical meaning.

Exam trap

FC0-U71 often tests the misconception that 'True' and 'False' are strings because they are written as words, when they are actually Boolean literals with distinct logical semantics.

How to eliminate wrong answers

Option A is wrong because a String stores sequences of characters (text), so 'True' would be treated as literal text rather than a logical truth value, breaking conditional evaluation. Option B is wrong because a Float stores decimal numbers (e.g., 3.14), which cannot represent logical truth values. Option D is wrong because an Integer stores whole numbers (e.g., 42, -7), and while some languages allow 0/1 as truthy/falsy, an Integer is not the dedicated type for True/False values.

Full explanation →

309

MCQhard

A query uses a LEFT JOIN between Customers and Orders. The result set includes customers with no orders. What does the Orders columns show for those customers?

A.NULL

B.The same as the customer ID

C.Zero

D.Empty string

AnswerA

A LEFT JOIN preserves every row from the left table (Customers) and matches rows from Orders where possible. When no matching order exists, the unmatched right-side columns are filled with NULL, which is exactly the behaviour the stem describes.

Why this answer

In a LEFT JOIN, all rows from the left table (Customers) are retained, and for rows with no matching rows in the right table (Orders), the columns from the right table are filled with NULL. This is the standard SQL behavior defined by the SQL standard (ISO/IEC 9075). Therefore, for customers with no orders, the Orders columns show NULL, not zero, an empty string, or any other default value.

Exam trap

The trap here is that candidates often confuse NULL with zero or an empty string, thinking a missing record should show a default value like 0 or '', but SQL strictly uses NULL to represent the absence of a matching row in a LEFT JOIN.

How to eliminate wrong answers

Option B is wrong because the Orders columns do not replicate the customer ID; they show NULL to indicate the absence of a matching order. Option C is wrong because zero is a numeric value that would imply an order exists with a zero value, not the absence of an order; SQL uses NULL for missing data. Option D is wrong because an empty string is a valid string value that would indicate an order with an empty field, not the lack of an order; NULL is the correct indicator for no matching row.

Full explanation →

310

MCQeasy

A user is creating a report that includes several photographs. After saving, the file size is larger than expected. Which data type is primarily responsible?

A.Audio

B.Text

C.Images

D.Video

AnswerC

Photographs are stored as images, and image data is far larger than text or numeric values because each pixel carries colour and position information. Embedding several photographs therefore inflates the saved report's file size, making images the data type primarily responsible.

Why this answer

Images, especially high-resolution photographs, contain a large amount of pixel data (e.g., 24-bit color depth per pixel) and are typically stored in uncompressed or losslessly compressed formats like BMP or PNG, resulting in significantly larger file sizes compared to text. The question explicitly mentions 'several photographs,' making images the primary data type responsible for the unexpectedly large file size.

Exam trap

The trap here is that candidates may confuse 'file size' with 'data type complexity' and incorrectly select 'Video' because they assume video is always the largest, but the scenario specifically limits the content to photographs, making images the direct and correct answer.

How to eliminate wrong answers

Option A is wrong because audio files, while potentially large, are not mentioned in the scenario—the report includes photographs, not audio clips. Option B is wrong because text data is extremely compact (typically 1 byte per character in ASCII or 2 bytes in UTF-16), so even large amounts of text would not cause the file size to be 'larger than expected' in the context of photographs. Option D is wrong because video data is composed of many frames and is typically much larger than a few still images, but the scenario only includes photographs, not video footage.

Full explanation →

311

MCQeasy

A small business uses a single Linux server to host a custom inventory management application written in Python. The application reads from a CSV file on the server to display current stock levels. Recently, users have reported that the inventory numbers are incorrect and sometimes the application crashes with a 'Permission denied' error when trying to save updates. The server has two user accounts: 'admin' (with sudo privileges) and 'app_user' (a standard user under which the application runs). The CSV file is located at /var/data/inventory.csv and currently has permissions -rw-rw---- and owner root:root. The application code uses the open() function to read and write the file. Which of the following actions should be taken to resolve the issue?

A.Modify the application to run as 'admin' using sudo.

B.Set the file permissions to 644 so all users can read the file.

C.Change the file owner to 'app_user' and set permissions to 755.

D.Change the group ownership to a group that includes 'app_user' and ensure the file has group write permission.

AnswerD

The file is root:root with mode 660, so app_user has neither read nor write access, causing the 'Permission denied' error and stale reads. Assigning group ownership to a group containing app_user, plus group write permission, grants the required access without running the application as root.

Why this answer

The application runs as 'app_user', which needs to write to /var/data/inventory.csv. The file is owned by root:root with permissions -rw-rw----, meaning only root and the root group can write. Changing the group ownership to a group that includes 'app_user' and granting group write permission (e.g., chown root:app_group /var/data/inventory.csv; chmod 664 /var/data/inventory.csv) allows the application to write without elevating privileges or exposing the file to all users.

Exam trap

The trap here is that candidates often assume changing file permissions to 644 (read for all) or changing the owner to the application user is sufficient, overlooking that the application needs write access and that group-based permissions provide a secure, least-privilege solution.

How to eliminate wrong answers

Option A is wrong because running the application as 'admin' with sudo would grant unnecessary root privileges, violating the principle of least privilege and introducing security risks. Option B is wrong because setting permissions to 644 would allow all users to read the file, but the application also needs to write; 644 does not include write permission for the group or others, so the 'Permission denied' error would persist on write attempts. Option C is wrong because changing the owner to 'app_user' with permissions 755 gives the owner write permission, but 755 grants read and execute to group and others, which is overly permissive and still does not address the group write requirement; additionally, changing owner to a non-root user may break other system processes that expect root ownership.

Full explanation →

312

MCQhard

Refer to the exhibit. A user reports that a recent Windows update failed to install. Which action should the technician take FIRST?

A.Run the Windows Update Troubleshooter

B.Disable the antivirus permanently

C.Manually download the update from Microsoft Update Catalog

D.Reinstall the operating system

AnswerA

The Windows Update Troubleshooter resets the update components, clears the SoftwareDistribution cache and repairs related services automatically. Running it first is the least invasive step, potentially resolving the failed installation before manual component resets or rollback attempts are needed.

Why this answer

The Windows Update Troubleshooter is the correct first step because it is a built-in diagnostic tool that automatically detects and resolves common issues preventing updates from installing, such as corrupted update files, misconfigured Windows Update services, or incorrect proxy settings. Running this troubleshooter is a non-invasive, low-risk action that often resolves the problem without requiring manual intervention or system changes.

Exam trap

CompTIA often tests the principle of least invasive troubleshooting first, so the trap here is that candidates may jump to a more complex or permanent solution (like disabling antivirus or reinstalling) instead of using the built-in, automated diagnostic tool that is designed specifically for this scenario.

How to eliminate wrong answers

Option B is wrong because permanently disabling the antivirus exposes the system to security threats and is unnecessary; a temporary disable or adding an exclusion for Windows Update is more appropriate. Option C is wrong because manually downloading the update from the Microsoft Update Catalog should only be attempted after automated troubleshooting fails, as it bypasses the built-in update mechanism and may lead to dependency or compatibility issues. Option D is wrong because reinstalling the operating system is a drastic, last-resort measure that is not warranted for a single failed update, and it would cause data loss and significant downtime.

Full explanation →

313

MCQeasy

A user complains that their smartphone photos take up too much space and that image quality is critical for printing. A technician explains that a particular image format uses lossy compression, which reduces file size by permanently discarding some image data. Which of the following formats is the technician describing?

A.BMP

B.GIF

C.PNG

D.JPEG

AnswerD

JPEG is a lossy compression format that reduces file size by permanently discarding some visual information, especially high-frequency detail. It is widely used for photographs because it achieves significant compression while maintaining acceptable quality for many uses. In this scenario, the technician is describing a format that trades some image data for smaller files, which matches JPEG's behavior. The user should be aware that repeated editing and saving can further degrade quality.

Why this answer

JPEG is the standard lossy image format that permanently removes some visual data to achieve smaller file sizes, making it suitable for photographs where slight quality loss is acceptable. The other formats either preserve all data or reduce colors without the same lossy compression mechanism. The technician's description of discarding image data to save space points directly to JPEG.

Exam trap

The trap here is assuming that any compressed image format is lossy, when formats like PNG and GIF use lossless compression and do not discard data to reduce size.

Full explanation →

314

MCQeasy

Based on the exhibit, which of the following best describes the file type?

A.Video file

B.Image file

C.Audio file

D.Text file

AnswerB

Image files store visual data as pixel grids or vector instructions, identified by extensions such as .jpg, .png or .gif. The exhibit's displayed attributes match this category, satisfying the question's requirement to classify the file type from the evidence shown.

Why this answer

The exhibit shows a file named 'screenshot.png'. The .png extension indicates a Portable Network Graphics file, which is a raster image format that uses lossless compression. Therefore, this file is an image file.

Exam trap

The trap here is that candidates may confuse file extensions with file content, assuming that any file with a common extension like .png could be a video or audio file if they don't recognize the standard mapping of extensions to file types.

How to eliminate wrong answers

Option A is wrong because a video file would have an extension like .mp4, .avi, or .mov, not .png. Option C is wrong because an audio file would have an extension like .mp3, .wav, or .aac, not .png. Option D is wrong because a text file would have an extension like .txt, .docx, or .pdf, not .png.

Full explanation →

315

Multi-Selectmedium

Which TWO of the following are examples of social engineering attacks?

Select 2 answers

A.DDoS

B.Shoulder surfing

C.Brute force

D.Man-in-the-middle

E.Phishing

AnswersB, E

Shoulder surfing is a social engineering technique: the attacker observes a victim physically typing credentials or PINs, exploiting human behaviour rather than software flaws. It satisfies the stem's requirement for a social engineering example because no technical vulnerability is exploited — observation alone yields the information.

Why this answer

Shoulder surfing (B) is a social engineering attack because it relies on directly observing a person—looking over their shoulder or using nearby cameras—to steal credentials, PINs, or other sensitive information through human interaction rather than technical exploitation. Phishing (E) is also social engineering since it manipulates a victim via deceptive emails, messages, or websites into revealing credentials or clicking malicious links, exploiting human trust rather than system vulnerabilities. By contrast, DDoS (A) is a network availability attack that floods a target with traffic, brute force (C) is a computational attack that systematically tries password or key combinations, and man-in-the-middle (D) is a network interception attack that relays or alters communications—none of these depend on psychologically manipulating a person, so they are not social engineering.

Exam trap

The trap here is that candidates may confuse technical attacks like DDoS or brute force with social engineering, failing to recognize that social engineering specifically exploits human trust or behavior, not system vulnerabilities.

Full explanation →

316

MCQmedium

A user reports that their computer is unable to access the internet, but can access local network resources. Which of the following is the most likely cause?

A.Windows Firewall blocking outbound traffic

B.Incorrect default gateway

C.DNS server not responding

D.Faulty Ethernet cable

AnswerB

With local resources reachable, the local IP configuration and NIC are functioning. An incorrect default gateway prevents the host from routing packets beyond its own subnet, so internet-bound traffic fails while local subnet communication succeeds.

Why this answer

The default gateway is the router that connects a local subnet to other networks, including the internet. If the default gateway is incorrect, the computer can communicate within its own subnet (local resources) but cannot route packets to external networks, causing internet access to fail while local access remains functional.

Exam trap

The trap here is that candidates often confuse DNS resolution with internet connectivity, assuming that if DNS is down, the internet is inaccessible, but the question specifies 'unable to access the internet' (not just resolve names), and local access works, which points to a routing issue at the default gateway.

How to eliminate wrong answers

Option A is wrong because Windows Firewall blocks traffic based on port/protocol rules, not routing; it would block both local and internet traffic if configured to block outbound, not selectively. Option C is wrong because a non-responding DNS server would prevent name resolution (e.g., cannot resolve google.com), but the user could still access the internet via IP address; the symptom here is complete inability to access the internet, not just name resolution failure. Option D is wrong because a faulty Ethernet cable would cause a complete loss of connectivity, including local network resources, not just internet access.

Full explanation →

317

MCQeasy

Which of the following is the binary representation of the decimal number 10?

A.1000

B.1010

C.1100

D.1110

AnswerB

Binary is base-2 positional notation: 1010 equals 1×8 + 0×4 + 1×2 + 0×1 = 10. Each bit represents a successive power of two, so the decimal value 10 maps exactly to 1010, satisfying the stem's conversion requirement.

Why this answer

Decimal 10 in binary is 1010. The place values from right to left are 1, 2, 4, 8; 8 + 2 = 10, so bits 3 and 1 are set (1010). This is a straightforward base-2 conversion.

Exam trap

The trap is misreading the bit positions or confusing binary with other bases (e.g., treating 1010 as decimal 1010 or as octal), causing candidates to select a value that looks plausible but does not equal 10.

How to eliminate wrong answers

Option A is wrong because 1000 in binary equals 8 in decimal, not 10. Option C is wrong because 1100 in binary equals 12 in decimal (8 + 4). Option D is wrong because 1110 in binary equals 14 in decimal (8 + 4 + 2).

Full explanation →

318

MCQeasy

A user reports that their desktop computer will not power on at all. No lights appear, and no fans spin. The power cable is securely connected to the wall outlet and the power supply. Which component should the technician check first?

A.The hard drive

B.The power supply unit

C.The CPU cooler

D.The RAM modules

AnswerB

When a computer shows no signs of power, the power supply unit is a primary suspect because it distributes electricity to all components. If it fails, no lights or fans will operate. Checking the PSU first is logical before examining other parts that depend on it for power.

Why this answer

A completely unresponsive computer with no lights or fan activity points to a power delivery problem, making the power supply unit the first component to check. RAM, hard drive, and CPU cooler issues would typically allow some signs of power or produce specific errors.

Exam trap

The trap here is jumping to internal components like RAM or storage when the total absence of power activity indicates a problem with the power supply or its connections.

Full explanation →

319

MCQeasy

A user is setting up a new wireless router at home. During configuration, they see options for Wi-Fi 5 (802.11ac) and Wi-Fi 6 (802.11ax). Which standard offers faster speeds and better performance in congested environments?

A.Wi-Fi 6

B.Neither affects speed

C.Both are identical in speed

D.Wi-Fi 5

AnswerA

Wi-Fi 6 (802.11ax) introduces OFDMA and MU-MIMO improvements that raise throughput and efficiency in dense, congested environments, unlike Wi-Fi 5 (802.11ac). Selecting it satisfies the stem's requirement for faster speeds and better performance under congestion, particularly where many devices share the same access point.

Why this answer

Wi-Fi 6 is the newer standard with higher data rates, improved efficiency, and better handling of multiple devices.

Full explanation →

320

MCQhard

Consider the following algorithm: SET x = 5 SET y = 2 SET result = x ^ y OUTPUT result Assuming '^' is the exponentiation operator, what is the output?

A.32

B.7

C.10

D.25

AnswerD

Exponentiation raises the base to the power of the exponent, so x ^ y computes 5², which equals 25. The stem explicitly defines '^' as the exponentiation operator, overriding its common bitwise XOR meaning, so the algorithm outputs 25 rather than 7.

Why this answer

The algorithm sets x = 5 and y = 2, then computes result = x ^ y, where '^' is the exponentiation operator. 5 raised to the power of 2 equals 25. Therefore, the output is 25, making option D correct.

Exam trap

The trap here is that candidates may confuse the exponentiation operator with the bitwise XOR operator (common in languages like C, Java, and Python), leading them to incorrectly compute 5 XOR 2 = 7 instead of 5^2 = 25.

How to eliminate wrong answers

Option A is wrong because 32 would be the result of 2^5 (2 raised to the power of 5), not 5^2. Option B is wrong because 7 is the sum of 5 and 2, not the result of exponentiation. Option C is wrong because 10 is the product of 5 and 2, not the result of exponentiation.

Full explanation →

321

Drag & Dropmedium

Drag and drop the steps to connect a Bluetooth device to a Windows 10 computer into the correct order.

Drag or tap steps into the slots.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

Why this order

Pairing a Bluetooth device requires making it discoverable and adding it via Settings.

Full explanation →

322

Multi-Selecthard

A user wants to purchase a new monitor for gaming. Which THREE specifications are most important for a smooth gaming experience?

Select 3 answers

A.Built-in speakers

B.Response time (e.g., 1ms, 5ms)

C.Number of USB ports

D.Resolution (e.g., 1080p, 4K)

E.Refresh rate (e.g., 60Hz, 144Hz)

AnswersB, D, E

Response time measures how quickly a pixel changes colour, and low values such as 1ms reduce motion blur and ghosting during fast gameplay. This directly satisfies the smooth-gaming requirement, unlike resolution or panel size, which affect sharpness and workspace rather than motion fluidity.

Why this answer

Option B, response time (e.g., 1ms, 5ms), is critical because it measures how quickly a pixel can change color, and lower values like 1ms reduce motion blur and ghosting during fast-paced gameplay. Option D, resolution (e.g., 1080p, 4K), matters because it determines the sharpness and detail of the image, directly affecting visual clarity and how many pixels the GPU must drive. Option E, refresh rate (e.g., 60Hz, 144Hz), is essential since a higher refresh rate allows the monitor to display more frames per second, producing smoother motion when paired with sufficient GPU output.

Options A and C do not belong: built-in speakers are a convenience audio feature unrelated to visual gaming performance, and USB ports are merely connectivity extras that do not affect smoothness or image quality.

Exam trap

FC0-U71 often tests the misconception that built-in speakers or USB ports matter for gaming performance; candidates may select them as important, but they are not.

Full explanation →

323

MCQhard

A technician is recommending a device to protect a server from data loss during a power outage. Which device should the technician recommend?

A.Uninterruptible Power Supply (UPS)

B.Generator

C.Power strip

D.Surge protector

AnswerA

A UPS supplies battery-backed power during an outage, letting the server shut down cleanly or ride through brief interruptions. This directly prevents data loss from abrupt power removal, satisfying the stem's requirement to protect the server during a power outage.

Why this answer

An Uninterruptible Power Supply (UPS) provides battery backup power to the server during a power outage, allowing for a safe shutdown or continued operation until power is restored. This directly prevents data loss by ensuring the server does not abruptly lose power while writing data to disk. Unlike other devices, a UPS combines surge protection with battery backup, making it the correct choice for this scenario.

Exam trap

The trap here is that candidates may confuse a surge protector's ability to protect against spikes with the UPS's ability to provide continuous power during an outage, or they may think a generator is suitable despite its startup delay and lack of instantaneous failover.

How to eliminate wrong answers

Option B (Generator) is wrong because a generator provides long-term backup power but has a startup delay (typically 10–30 seconds) that cannot prevent data loss from an instantaneous power outage; it also requires fuel and maintenance. Option C (Power strip) is wrong because it merely distributes power to multiple devices with no protection against power loss, surges, or data loss. Option D (Surge protector) is wrong because it only protects against voltage spikes and does not provide any battery backup to keep the server running during a power outage.

Full explanation →

324

MCQeasy

A small business keeps its customer list in a single spreadsheet where the customer's city and state are typed into every invoice row. The owner wants a structure that stores each customer's address once and references it from many invoices without duplicating the address text. Which database concept should the owner apply?

A.Create a separate Customers table with a primary key, and store only that key in the Invoices table.

B.Apply a UNIQUE constraint to the City column in the invoice table.

C.Convert the spreadsheet to a comma-separated values file and re-import it each month.

D.Add an index to the City column so repeated city names are stored only once.

AnswerA

This is correct because it splits the repeated address data into one Customers table keyed by a unique identifier, and the Invoices table keeps only a foreign key reference. Each address is stored once, eliminating duplicated city and state text, which is exactly the normalization goal described. The relationship remains intact because the key links every invoice back to its single customer record.

Why this answer

Storing each customer's address once and referencing it from many invoices is achieved by moving the address into a Customers table with a primary key and placing a foreign key in the Invoices table. This removes repeated text, prevents inconsistent updates, and preserves the one-to-many relationship between customers and invoices.

Exam trap

The trap here is assuming that an index or a UNIQUE constraint removes duplicated data, when both only affect search performance or enforce distinctness rather than restructuring where the data lives.

Full explanation →

325

MCQeasy

A small business wants to store customer contact information and order history. The data is structured and relationships between customers and orders must be enforced. Which type of database is most appropriate?

A.Flat-file database

B.Relational database

C.NoSQL database

D.Hierarchical database

AnswerB

A relational database stores structured data in tables with defined schemas and enforces relationships through primary and foreign keys, guaranteeing referential integrity between customers and orders. This satisfies the stated requirement that relationships be enforced, which a non-relational store would not guarantee natively.

Why this answer

A relational database enforces structured schemas and relationships (via primary and foreign keys), which is exactly what is needed to link customers to their orders and maintain referential integrity. It supports SQL queries and transactions, making it ideal for structured business data with enforced relationships. This matches the requirement for structured data with enforced relationships.

Exam trap

The trap is that NoSQL is trendy and 'scalable,' so candidates pick it for a small business — but the question's keywords 'structured' and 'relationships must be enforced' point squarely to relational.

How to eliminate wrong answers

Option A is wrong because a flat-file database stores data in a single table without relationships, so it cannot enforce customer-to-order links or prevent orphan records. Option C is wrong because NoSQL databases typically relax schema and relationship enforcement, favoring scalability and flexible data models over strict referential integrity. Option D is wrong because a hierarchical database models data as a tree with parent-child links, which is rigid and poorly suited to many-to-many relationships like customers and orders across time.

Full explanation →

326

MCQmedium

A user reports that their printer is not working. The printer is connected via USB to a workstation, and other users can print to the same printer over the network. Which of the following should the technician check FIRST?

A.Paper jam in the printer

B.USB cable connection

C.Printer driver on the workstation

D.Printer sharing settings on the network

AnswerB

Since other users print successfully over the network, the printer and its network path work, narrowing the fault to the local workstation's USB link. Verifying the USB cable connection first is the cheapest, most likely physical cause before investigating drivers or spooler.

Why this answer

Since other users can print to the same printer over the network, the printer itself is operational and reachable. The issue is isolated to the local workstation, making the USB cable connection the most likely point of failure. A loose, damaged, or disconnected USB cable would prevent the workstation from communicating with the printer, so checking the physical connection is the quickest and simplest first step.

Exam trap

The trap here is that candidates often jump to software or network issues (driver or sharing settings) when the problem is actually a simple physical layer failure, ignoring the OSI model's Layer 1 as the first troubleshooting step.

How to eliminate wrong answers

Option A is wrong because a paper jam would affect all users printing to that printer, not just one workstation. Option C is wrong because while a corrupted printer driver could cause local printing issues, it is less likely than a simple physical connection problem and should be checked after verifying the cable. Option D is wrong because printer sharing settings on the network are irrelevant; other users can already print, confirming the network sharing configuration is correct.

Full explanation →

327

Multi-Selecteasy

A user wants to synchronize files across multiple devices, including an iPhone, a Windows laptop, and an Android tablet. Which TWO cloud services would be most effective for this cross-platform syncing?

Select 2 answers

A.Bluetooth file transfer

B.OneDrive

C.Google Drive

D.iTunes sync

E.iCloud

AnswersB, C

OneDrive offers native clients for iOS, Android and Windows, so files sync across the iPhone, Android tablet and Windows laptop. Its cross-platform availability satisfies the requirement to synchronise the same files on all three device types.

Why this answer

OneDrive (B) is correct because Microsoft's OneDrive client is available for iOS, Android, Windows, and the web, allowing the same files to be synced and accessed across an iPhone, Windows laptop, and Android tablet. Google Drive (C) is also correct because Google provides Drive apps for iOS, Android, Windows, and the web, enabling cross-platform file synchronization among those exact devices. Bluetooth file transfer (A) is not a cloud service and only supports short-range, manual device-to-device transfers, so it does not synchronize files across multiple devices. iTunes sync (D) is designed primarily for Apple device management and local syncing with a computer, not cloud-based cross-platform synchronization. iCloud (E) is not the best fit here because, while it has some Windows and web support, it is optimized for Apple's ecosystem and does not natively sync files on Android devices.

Exam trap

FC0-U71 often tests whether candidates conflate platform-locked services (iCloud, iTunes) with genuinely cross-platform cloud sync offerings, or mistake local transfer methods (Bluetooth) for cloud synchronization.

Full explanation →

328

MCQmedium

An employee is working from a coffee shop and needs to access company files. Which of the following is the most secure method?

A.Use a VPN to encrypt all traffic between the laptop and the company

B.Connect directly to the company's network over the public Wi-Fi

C.Disable file sharing on the laptop

D.Use HTTPS websites only

AnswerA

A VPN builds an encrypted tunnel between the laptop and the company network, so credentials and files stay unreadable across the untrusted coffee-shop Wi-Fi. This satisfies the secure-access constraint, whereas plain HTTPS or public hotspots leave traffic exposed to interception.

Why this answer

A VPN encrypts all traffic between the laptop and the company network, protecting data from eavesdropping on the untrusted public Wi-Fi. This ensures that even if the coffee shop's network is compromised, the employee's files and credentials remain secure. It is the most secure method because it provides end-to-end encryption and authenticated access to company resources.

Exam trap

FC0-U71 often tests the misconception that HTTPS alone is sufficient for secure remote access — candidates must recognize that a VPN is required to encrypt all traffic and access internal resources securely.

How to eliminate wrong answers

Option B is wrong because connecting directly to the company's network over public Wi-Fi does not encrypt traffic; it exposes data to interception on the untrusted network. Option C is wrong because disabling file sharing on the laptop reduces local exposure but does not secure the connection to company files, leaving traffic vulnerable. Option D is wrong because using HTTPS websites only encrypts web traffic to those sites but does not protect other protocols or provide access to internal company file shares, which may not be web-based.

Full explanation →

329

Multi-Selectmedium

A database administrator needs to choose a database for an e-commerce application that requires high availability and automatic scaling. Which TWO options are cloud database services?

Select 2 answers

A.SQLite

B.Google Cloud SQL

C.Microsoft SQL Server Express

D.MySQL Community Edition

E.Amazon RDS

AnswersB, E

Google Cloud SQL is a fully managed relational database service hosted on Google Cloud, so it satisfies the stem's cloud database requirement. The provider handles availability and scaling, meeting the high-availability and automatic-scaling constraint for the e-commerce application.

Why this answer

Google Cloud SQL (B) is a fully managed, cloud-hosted relational database service on Google Cloud Platform that supports MySQL, PostgreSQL, and SQL Server, making it a cloud database service suitable for high availability and scaling needs. Amazon RDS (E) is AWS's managed relational database service that automates provisioning, patching, backups, and Multi-AZ failover, directly matching the e-commerce requirement for high availability and automatic scaling. By contrast, SQLite (A) is an embedded, serverless file-based library, not a cloud service.

Microsoft SQL Server Express (C) is a free on-premises edition of SQL Server with size and resource limits, and MySQL Community Edition (D) is a self-managed open-source database typically deployed on your own infrastructure, so neither is a managed cloud database service.

Exam trap

The trap is confusing 'database software' with 'cloud database service' — FC0-U71 tests whether you recognize that MySQL Community Edition and SQL Server Express are self-managed products, not cloud services.

Full explanation →

330

MCQhard

Which of the following best describes the function of a web API?

A.It encrypts data transmitted between a web browser and server.

B.It is a programming language used to query databases.

C.It provides a graphical user interface for web applications.

D.It allows different software applications to communicate and exchange data.

AnswerD

A web API exposes defined endpoints over HTTP so separate applications can request and exchange data regardless of language or platform, satisfying the requirement to describe its core function. It is not a database, browser, or storage service.

Why this answer

A web API (Application Programming Interface) is a set of defined endpoints, protocols, and data formats that allow different software applications to communicate and exchange data over HTTP/HTTPS. It abstracts backend logic so clients (web apps, mobile apps, third-party services) can request and submit data without knowing internal implementation details. Common examples include REST APIs using JSON and SOAP APIs using XML.

Exam trap

The trap is conflating the API with the transport security (TLS) or the user interface—candidates often pick 'encrypts data' because APIs are commonly accessed over HTTPS, but encryption is a separate layer from the API's core function of enabling application-to-application communication.

How to eliminate wrong answers

Option A is wrong because encryption of browser-server traffic is handled by TLS/SSL (HTTPS), not by the API itself—an API can be exposed over plain HTTP without encryption. Option B is wrong because an API is not a programming language; it is an interface specification, and while APIs may be queried using languages like SQL or GraphQL, the API itself is not a language. Option C is wrong because a web API provides no graphical user interface—it returns data (typically JSON or XML), and any GUI is built separately by the consuming application.

Full explanation →

331

MCQhard

A security analyst is reviewing access logs and notices that an employee in the marketing department was able to read files in the human resources shared folder. The employee's account should only have access to marketing resources. Which security principle was violated?

A.Zero trust

B.Least privilege

C.Separation of duties

D.Defense in depth

AnswerB

Least privilege means users should have only the minimum access necessary to perform their job. The marketing employee was able to read HR files, which is beyond their required access. This violation of least privilege can lead to data exposure and is a common finding in access control audits.

Why this answer

The principle of least privilege states that users should be granted only the access required for their role. The marketing employee reading HR files indicates excessive permissions. Separation of duties, defense in depth, and zero trust are related concepts but do not directly name the violation of over-provisioned access.

Exam trap

The trap here is confusing least privilege with separation of duties, which is about dividing tasks to prevent fraud, not about limiting access to data.

Full explanation →

332

MCQeasy

A bookstore owner wants to list all book titles stored in a table named Inventory, sorted alphabetically by title. Which SQL statement should be used?

A.SELECT title FROM Inventory WHERE title ASC;

B.SELECT title FROM Inventory SORT BY title;

C.SELECT title FROM Inventory GROUP BY title;

D.SELECT title FROM Inventory ORDER BY title;

AnswerD

This statement selects the title column from the Inventory table and uses ORDER BY title to sort the result alphabetically in ascending order by default. It directly satisfies the requirement to list all titles in alphabetical order without retrieving unnecessary columns or applying filters that would exclude rows.

Why this answer

Sorting query output is accomplished with the ORDER BY clause, which arranges rows by one or more columns and defaults to ascending order. The statement that selects the title column and applies ORDER BY title returns every book title in alphabetical order, matching the bookstore owner's request without filtering or aggregating the data.

Exam trap

The trap here is confusing the filtering clause WHERE with the sorting clause ORDER BY, leading to attempts to place sort directions inside a WHERE condition.

Full explanation →

333

MCQeasy

A junior developer needs to create a simple program that adds two numbers and displays the result. Which programming paradigm is most suitable for this task?

A.Functional programming

B.Declarative programming

C.Object-oriented programming

D.Procedural programming

AnswerD

Procedural programming structures a solution as a sequence of steps and procedure calls, which suits a simple linear task: read two values, add them, print the result. No objects, classes or state modelling are needed here.

Why this answer

Procedural programming is the most suitable paradigm for a simple program that adds two numbers and displays the result because it follows a linear, step-by-step sequence of instructions. The developer writes a series of statements (e.g., `result = a + b; print(result)`) that execute in order, directly mapping the task's logic without unnecessary abstraction. This paradigm is ideal for small, straightforward tasks where clarity and direct control over execution flow are paramount.

Exam trap

CompTIA often tests the misconception that object-oriented programming is always the 'modern' or 'best' choice, leading candidates to select it even for trivial tasks where its overhead is unnecessary.

How to eliminate wrong answers

Option A is wrong because functional programming emphasizes pure functions, immutability, and avoiding side effects, which adds unnecessary complexity (e.g., recursion or higher-order functions) for a trivial addition task. Option B is wrong because declarative programming focuses on describing the desired outcome (e.g., SQL query `SELECT a + b`) rather than the step-by-step control flow, which is not the natural approach for a simple imperative calculation. Option C is wrong because object-oriented programming introduces classes, objects, and encapsulation, which are overkill for a two-number addition; it would require defining a class with a method, adding boilerplate code that obscures the simple logic.

Full explanation →

334

MCQeasy

What is the difference between a threat and a vulnerability?

A.A threat is a potential harm, and a vulnerability is a weakness

B.They are the same thing

C.A threat is a weakness, and a vulnerability is a danger

D.A threat is a type of malware, and a vulnerability is a type of attack

AnswerA

A threat is any potential cause of harm, such as an attacker or malware, whereas a vulnerability is an existing weakness — an unpatched flaw or misconfiguration — that a threat could exploit. This distinction satisfies the stem's requirement to separate the external danger from the internal condition it acts upon.

Why this answer

A threat is a potential source of harm (e.g., a hacker), while a vulnerability is a weakness that can be exploited (e.g., unpatched software).

Full explanation →

335

MCQeasy

A technician needs to set up a small office network with 15 computers. The computers should be able to communicate with each other and share a single internet connection. Which device is required to enable internet sharing?

A.Modem

B.Hub

C.Router

D.Switch

AnswerC

A router forwards packets between the local subnet and the ISP, performing NAT so all 15 computers share one public IP address. A switch alone only connects devices within the LAN and cannot provide internet sharing, so the router satisfies the single-connection constraint.

Why this answer

A router is required to enable internet sharing because it performs Network Address Translation (NAT), which allows multiple devices on a local network to share a single public IP address provided by the ISP. The router also routes traffic between the local subnet and the internet, making it the essential device for both inter-device communication and internet access.

Exam trap

The trap here is that candidates often confuse a switch with a router, thinking that a switch can provide internet access because it connects devices, but they overlook that internet sharing requires Layer 3 routing and NAT, which only a router can perform.

How to eliminate wrong answers

Option A is wrong because a modem only converts signals between the ISP's line (e.g., DSL, cable) and the local network; it does not perform NAT or routing, so it cannot enable multiple computers to share a single internet connection. Option B is wrong because a hub operates at Layer 1 (physical layer) and simply repeats electrical signals to all ports; it provides no intelligence for IP addressing, NAT, or internet sharing. Option D is wrong because a switch operates at Layer 2 (data link layer) and forwards frames based on MAC addresses; while it allows local communication between computers, it cannot perform NAT or route traffic to the internet.

Full explanation →

336

Multi-Selectmedium

A development team is using an agile methodology. Which TWO of the following are typical practices in agile development?

Select 2 answers

A.Waterfall phase transitions

B.Fixed scope defined at project start

C.Iterative development with short cycles

D.Daily standup meetings

E.Detailed design phase before coding

AnswersC, D

Agile delivers work in short, fixed-length iterations (typically one to four weeks), each producing a potentially shippable increment. This iterative cadence directly satisfies the stem's agile methodology constraint, enabling frequent inspection and adaptation rather than a single sequential delivery phase.

Why this answer

Option C is correct because agile development is built on iterative, incremental delivery through short cycles (sprints or iterations, typically 1–4 weeks) that produce a potentially shippable increment and allow frequent reprioritization based on feedback. Option D is correct because the daily standup (a short, time-boxed Scrum ceremony, usually 15 minutes) is a hallmark agile practice for synchronizing the team, surfacing impediments, and maintaining transparency. Options A and E are incorrect because waterfall phase transitions and a detailed design phase completed before coding reflect sequential, plan-driven lifecycle models rather than agile's continuous, cross-functional delivery.

Option B is incorrect because agile embraces emergent, reprioritized scope (e.g., a groomed product backlog) rather than a fixed scope locked at project start.

Exam trap

FC0-U71 often tests the contrast between agile and waterfall terminology — candidates pick options like 'fixed scope' or 'detailed design phase' because those sound like good project management, but they are actually waterfall hallmarks.

Full explanation →

337

MCQeasy

A junior developer is writing a program that must repeatedly ask the user for a password until the correct password is entered. The developer needs a programming construct that will keep running the same block of code while a condition remains true. Which programming concept should the developer use?

A.A conditional statement

B.A function

C.A variable

D.A loop

AnswerD

A loop is a control structure that repeats a block of code as long as a specified condition evaluates to true. In this scenario, the developer can place the password prompt inside the loop and use a condition such as 'password does not match' to keep asking until the correct value is entered, which is exactly the behavior required.

Why this answer

The requirement is repetition based on a condition, which is the definition of a loop. A loop checks its condition and repeats the enclosed statements until the condition becomes false, so placing the password prompt inside a loop that continues while the password is incorrect achieves the desired behavior. Other constructs such as functions, variables, and conditional statements control structure or storage but do not inherently repeat code.

Exam trap

The trap here is confusing a conditional statement, which chooses a path once, with a loop, which repeats a block while a condition remains true.

Full explanation →

338

MCQhard

Which type of malware replicates itself across a network without user interaction?

A.Virus

B.Ransomware

C.Worm

D.Trojan

AnswerC

A worm self-propagates across networks by exploiting vulnerabilities in network services, requiring no user interaction, unlike viruses that need a host file or user action to spread. This directly satisfies the stem's constraint of replication without user interaction, making it the defining characteristic that distinguishes worms from other malware types.

Why this answer

A worm is a standalone malware program that replicates itself across a network by exploiting vulnerabilities or using network protocols (e.g., SMB, HTTP) without requiring any user action, such as opening a file or executing a payload. Unlike a virus, which attaches to a host file and needs user interaction to spread, a worm self-propagates automatically, making it the correct answer for malware that spreads without user interaction.

Exam trap

The trap here is that candidates confuse a worm with a virus, assuming both require user interaction, but the key distinction is that a worm self-replicates over a network autonomously, while a virus requires a host file and user action to spread.

How to eliminate wrong answers

Option A is wrong because a virus requires user interaction (e.g., opening an infected file or running a malicious macro) to attach to a host program and replicate; it does not autonomously spread across a network. Option B is wrong because ransomware is a type of malware that encrypts files or locks a system for ransom, but its primary mechanism is extortion, not self-replication across a network without user interaction. Option D is wrong because a Trojan disguises itself as legitimate software to trick users into installing it, relying on social engineering and user action, and it does not replicate itself at all.

Full explanation →

339

MCQhard

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?

A.Disable the Windows Firewall on the server to allow traffic

B.Replace the cable modem as it is not routing traffic correctly

C.Configure the DNS server to forward queries to 8.8.8.8

D.Change the DHCP scope option for the default gateway to 192.168.1.1

AnswerD

The DHCP scope currently hands out 192.168.1.10 as the default gateway, so clients route all off-subnet traffic to the server, which is not a router and cannot forward it to the modem. Setting the gateway to 192.168.1.1 restores correct next-hop routing for internet access.

Why this answer

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.

Exam trap

The trap here is that candidates may assume the server can act as a router because it is a domain controller and file server, but without enabling routing services (like RRAS), the server will not forward traffic between subnets or to the internet.

How to eliminate wrong answers

Option A is wrong because disabling the Windows Firewall on the server would not fix the routing issue; the server is not acting as a router, and the firewall is not blocking client traffic to the modem. Option B is wrong because the cable modem is online and the server can ping it, indicating the modem is functioning correctly; the problem is that clients are not using the modem as their gateway. Option C is wrong because DNS forwarding to 8.8.8.8 would not resolve the connectivity issue; the client cannot ping the modem, which is a layer 3 routing problem, not a DNS resolution problem.

Full explanation →

340

MCQmedium

A user reports that their laptop cannot connect to the corporate Wi-Fi network. Other users in the same area are connected without issues. The laptop shows it is connected to the Wi-Fi but has no internet access. Which of the following is the MOST likely cause?

A.Weak Wi-Fi signal

B.SSID broadcast disabled

C.Incorrect IP configuration

D.MAC address filter enabled

AnswerC

Static IP or wrong DHCP settings can cause local connectivity but no internet.

Why this answer

The laptop shows it is connected to Wi-Fi but has no internet access, which indicates that the Layer 3 (network layer) configuration is faulty. An incorrect IP configuration, such as a static IP in the wrong subnet or a failed DHCP lease, prevents the laptop from obtaining a valid default gateway and DNS server, breaking internet connectivity while the Wi-Fi association (Layer 2) remains intact.

Exam trap

The trap here is that candidates confuse a successful Layer 2 association (connected to Wi-Fi) with full Layer 3 connectivity, leading them to choose weak signal or MAC filtering instead of recognizing that the issue is at the IP configuration layer.

How to eliminate wrong answers

Option A is wrong because a weak Wi-Fi signal would cause intermittent disconnections or a very low link quality, not a stable connection with no internet access. Option B is wrong because if the SSID broadcast were disabled, the laptop would not see the network in the scan list and could not connect at all, but the user reports it is connected. Option D is wrong because a MAC address filter enabled would block the laptop from associating with the access point entirely, resulting in a failure to connect to the Wi-Fi, not a connected state with no internet.

Full explanation →

341

MCQhard

A technician is troubleshooting a computer that fails to boot. The technician suspects corrupted firmware. Which component stores the firmware that initializes hardware during boot?

A.RAM

B.Hard drive

C.ROM chip on motherboard

D.CMOS battery

AnswerC

The motherboard ROM chip holds the firmware (UEFI/BIOS) that performs power-on self-test and initialises hardware before handing control to the bootloader. This directly satisfies the stem's requirement for the component storing firmware that initialises hardware during boot, distinguishing it from RAM or storage, which hold no persistent boot firmware.

Why this answer

Firmware that initializes hardware during boot (BIOS/UEFI) is stored in a ROM chip on the motherboard, typically a flash EEPROM or SPI flash chip. This non-volatile memory retains the firmware even when power is removed, allowing the system to begin the boot process.

Exam trap

The trap is confusing the CMOS battery/CMOS chip (which stores settings and time) with the ROM/flash chip (which stores the firmware code), causing candidates to select the CMOS battery when asked where firmware resides.

How to eliminate wrong answers

Option A is wrong because RAM is volatile memory that loses its contents when power is removed and is used for runtime data, not persistent firmware. Option B is wrong because the hard drive stores the operating system and user data, not the firmware that initializes hardware before the OS loads. Option D is wrong because the CMOS battery powers a small CMOS chip that stores BIOS settings (date, time, boot order) and the real-time clock, but not the firmware code itself.

Full explanation →

342

Multi-Selectmedium

A user is choosing a backup strategy for a laptop that contains important documents. The user wants copies of files stored in a second location and wants to be able to restore an earlier version of a file that was accidentally modified. Which TWO actions should the user perform? (Choose two.)

Select 2 answers

A.Run Disk Cleanup to remove temporary files from the system drive.

B.Copy important files to an external USB drive regularly.

C.Enable File History in Windows to back up files to another drive.

D.Defragment the hard drive to improve file access speed.

E.Create a compressed ZIP archive of the files on the same drive.

AnswersB, C

Copying files to an external USB drive creates a second copy in a separate location, satisfying the requirement for redundancy. If the laptop fails or files are deleted, the external copy can be used for restoration. Regular copying also preserves older versions until they are overwritten, supporting recovery of earlier file states.

Why this answer

A sound backup strategy needs both a second copy in a different location and the ability to recover earlier file versions. Copying to an external USB drive provides redundancy, while File History automatically maintains versioned backups on a separate drive. Maintenance tasks such as Disk Cleanup and defragmentation do not create backups, and a ZIP archive on the same drive offers neither off-device protection nor version history.

Exam trap

The trap here is treating any file maintenance or space-saving activity, such as Disk Cleanup or compression, as a form of backup.

Full explanation →

343

MCQmedium

A user is creating an account on a shopping website and is asked to choose a password. Which of the following passwords BEST follows current security guidance for resisting brute-force and dictionary attacks?

A.correct-horse-battery-staple-42

B.Jk7#pQ2!

C.P@ssw0rd123

D.Summer2024!

AnswerA

A long passphrase of several unrelated words plus a number reaches high length, which is the dominant factor in resisting brute-force attacks. The words are not a common phrase, so dictionary attacks that try famous passphrases fail. Length combined with unpredictability makes this the strongest option against both brute-force and dictionary cracking.

Why this answer

Current guidance favors long, memorable passphrases over short strings with forced complexity. A multi-word passphrase of unrelated words reaches a length that makes brute-force attacks impractical and avoids the predictable patterns that dictionary attacks target. Short complex strings and common word-plus-year patterns remain vulnerable because attackers test those exact constructions first.

Exam trap

The trap here is believing that symbol substitution and mixed case make a short password strong, when length and unpredictability are what actually resist cracking.

Full explanation →

344

Multi-Selecteasy

Which TWO of the following are advantages of server virtualization? (Select TWO.)

Select 2 answers

A.Easier backup and recovery using snapshots

B.Increased security by isolating VMs

C.Eliminates the need for operating system licenses

D.Improved performance over physical servers

E.Better hardware utilization through consolidation

AnswersA, E

Snapshots provide point-in-time recovery.

Why this answer

Server virtualization allows administrators to take snapshots of virtual machines (VMs) at a specific point in time. These snapshots capture the entire VM state, including disk, memory, and power state, enabling quick and consistent backup and recovery without the complexity of traditional physical server backups.

Exam trap

The trap here is that candidates mistakenly believe VM isolation guarantees security (Option B) or that virtualization eliminates OS licensing costs (Option C), when in fact isolation is a feature that requires proper configuration and licensing still applies per VM.

Full explanation →

345

MCQmedium

A user complains that their laptop battery drains quickly even when the laptop is idle. A technician suspects that a background process is consuming resources. Which of the following Windows tools should the technician use to identify the process consuming the most CPU or disk resources?

A.Event Viewer

B.Task Manager

C.Device Manager

D.Disk Management

AnswerB

Task Manager displays running processes and their real-time CPU, memory, disk, and network usage. In this scenario, the technician can open Task Manager, sort by CPU or disk, and identify the process draining battery. It is the standard Windows tool for this purpose.

Why this answer

Task Manager is the built-in Windows utility that shows real-time resource usage by process. By sorting on CPU or disk columns, the technician can quickly identify a background process causing high usage and draining the battery. The other tools serve different purposes and do not provide per-process resource monitoring.

Exam trap

The trap here is assuming that any monitoring tool can show process resource usage, when only Task Manager (or Resource Monitor) provides that real-time per-process view.

Full explanation →

346

MCQmedium

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

A.Switch

B.Access point

C.Modem

D.Router

AnswerC

A modem modulates and demodulates the carrier signal from the ISP's line, converting it into digital data a computer can process. Routers, switches and access points forward or distribute traffic but do not perform this analogue-to-digital conversion.

Why this answer

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.

Exam trap

FC0-U71 often tests the confusion between modem and router, tricking candidates into choosing router because it's the device they associate with 'internet,' when the question specifically asks about signal conversion.

How to eliminate wrong answers

Option A is wrong because a switch forwards frames within a LAN based on MAC addresses; it does not convert ISP signals. Option B is wrong because an access point bridges wireless clients to a wired LAN; it does not convert ISP signals. Option D is wrong because a router forwards packets between networks based on IP addresses; while it often sits behind a modem, it does not perform the signal conversion from the ISP medium.

Full explanation →

347

MCQeasy

A small business owner installs a wireless access point in a coffee shop for customers. The owner wants to prevent strangers outside the building from reading the wireless traffic of paying customers. Which security feature should be enabled on the access point?

A.MAC address filtering on the access point

B.WPA3 encryption with a shared passphrase

C.Disabling the SSID broadcast

D.Reducing the transmit power of the access point

AnswerB

WPA3 encrypts wireless frames between client devices and the access point using SAE, so anyone capturing the radio signals cannot read the customer traffic. It also replaces the weak WPA2 handshake, resisting offline dictionary attacks. Enabling WPA3 with a shared passphrase directly satisfies the goal of stopping outsiders from reading over-the-air data in the coffee shop.

Why this answer

Wireless signals travel through walls and into public spaces, so the only reliable way to keep outsiders from reading customer traffic is strong over-the-air encryption. WPA3 with a shared passphrase encrypts every frame using SAE, preventing passive eavesdroppers from recovering data even if they capture the radio transmissions. Hiding the SSID, filtering MAC addresses, and lowering power are obscurity or access measures that leave traffic readable.

Exam trap

The trap here is assuming that hiding the network name or filtering MAC addresses keeps wireless traffic private, when neither actually encrypts the data.

Full explanation →

348

MCQmedium

A junior programmer is reviewing a piece of pseudocode written by a teammate. The pseudocode contains the line: total = total + item. The programmer wants to know what type of operation this line performs in the algorithm. Which of the following best describes this line?

A.It outputs the value of total and item to the user.

B.It declares total as a new variable of type item.

C.It performs a comparison between total and item.

D.It assigns the sum of total and item back to total.

AnswerD

The statement total = total + item evaluates the right side first by adding the current value of total to item, then stores the result in total. This is a common accumulator pattern in pseudocode and programming, where a running total is updated each time the loop processes a new item from a collection or input stream.

Why this answer

The statement total = total + item is an assignment that adds the current value of total to item and stores the result back into total. This accumulator pattern is used to keep a running sum while processing items in a loop. It is not a comparison, declaration, or output statement, so the correct description is that it assigns the sum back to total.

Exam trap

The trap here is confusing the equals sign in pseudocode with mathematical equality or a comparison operator instead of recognizing it as an assignment.

Full explanation →

349

MCQeasy

What is the binary representation of the decimal number 10?

A.1001

B.1110

C.1010

D.1100

AnswerC

Converting decimal 10 by repeated division by two yields remainders 0, 1, 0, 1, which read bottom-to-top give 1010. This satisfies the stem's requirement for the binary representation of ten: 8 + 2 = 10, matching the four-bit value exactly.

Why this answer

The decimal number 10 is converted to binary by dividing by 2 repeatedly: 10 ÷ 2 = 5 remainder 0, 5 ÷ 2 = 2 remainder 1, 2 ÷ 2 = 1 remainder 0, 1 ÷ 2 = 0 remainder 1. Reading the remainders from bottom to top gives 1010. This matches option C.

Exam trap

The trap here is that candidates often confuse the binary for 10 with the binary for 12 (1100) or 14 (1110) by misplacing the '1' bits, or they incorrectly convert by adding 1 to the binary for 9 (1001) instead of performing proper division.

How to eliminate wrong answers

Option A (1001) is wrong because it represents decimal 9, not 10 — the binary place values are 8+0+0+1 = 9. Option B (1110) is wrong because it represents decimal 14 (8+4+2+0 = 14), which is a common confusion when misplacing the most significant bit. Option D (1100) is wrong because it represents decimal 12 (8+4+0+0 = 12), often chosen by candidates who incorrectly double the value or misremember the pattern.

Full explanation →

350

MCQeasy

A small business owner wants to let visitors use the office Wi-Fi without giving them access to the company's file server or networked printers. Which of the following is the BEST way to accomplish this?

A.Change the Wi-Fi password and post it on a sign in the lobby so all visitors can connect.

B.Enable a guest network on the wireless router that is isolated from the internal LAN.

C.Disable SSID broadcast so the wireless network name is hidden from visitors.

D.Turn on WPA3 encryption for the wireless network and require a strong passphrase.

AnswerB

A guest network broadcasts a separate SSID and places visitors on a segmented subnet that is firewalled off from internal resources such as file shares and printers. This directly satisfies the owner's goal because visitors get internet access only, while company data and devices remain unreachable from the guest segment.

Why this answer

Segmenting visitors onto a dedicated guest network keeps them away from internal file servers and printers while still providing internet access. Encryption, hidden SSIDs, and shared passwords all leave guests on the same network as company assets, so only a firewalled guest SSID meets the requirement of access without exposure.

Exam trap

The trap here is assuming that any wireless security feature, such as encryption or a hidden SSID, also limits which internal resources a connected visitor can reach.

Full explanation →

351

Multi-Selecteasy

Which TWO of the following are types of optical disc storage? (Select exactly two.)

Select 2 answers

A.DVD

B.SSD

C.HDD

D.Flash drive

E.CD

AnswersA, E

Digital Versatile Disc is an optical storage medium.

Why this answer

DVD (Digital Versatile Disc) is a type of optical disc storage that uses a laser to read and write data on a reflective plastic disc. It is a standard optical media format, distinct from magnetic or solid-state storage technologies.

Exam trap

The trap here is that candidates often confuse storage categories, mistakenly classifying SSDs or flash drives as 'optical' because they are removable or used for similar purposes, but the exam strictly tests the physical media type (laser-read vs. magnetic or solid-state).

Full explanation →

352

MCQhard

A programmer writes a loop that performs a bitwise AND operation between the byte 0b11001100 and the mask 0b00001111. What is the result in decimal?

A.204

B.0

C.12

D.15

AnswerC

Correct result.

Why this answer

Bitwise AND compares each bit position: 1 AND 1 = 1, otherwise 0. For 0b11001100 AND 0b00001111, only the lower nibble survives: 1100 in binary = 12 in decimal. The upper nibble (1100) is masked out by the zeros in the mask.

Exam trap

The trap is confusing bitwise AND with bitwise OR or misaligning the bit positions, causing candidates to compute the OR result (0b11001111 = 207) or the original byte value (204) instead of the masked result (12).

How to eliminate wrong answers

Option A is wrong because 204 is the decimal value of 0b11001100 (the original byte), which would result from an OR with all ones or no masking, not an AND with 0b00001111. Option B is wrong because 0 would result only if the mask were 0b00000000 or if the AND produced no set bits, which is not the case here. Option D is wrong because 15 (0b00001111) is the mask itself, which would be the result only if the original byte had all ones in the lower nibble and the mask were applied to 0b11111111.

Full explanation →

353

Multi-Selectmedium

A technician is explaining data representation to a trainee. Which TWO of the following are character encoding standards used in computing? (Select TWO).

Select 2 answers

A.MP3

B.ASCII

C.JPEG

D.ZIP

E.Unicode/UTF-8

AnswersB, E

ASCII assigns a unique 7-bit numeric value to each character, covering English letters, digits and control codes, which satisfies the stem's requirement for a character encoding standard. It maps characters to binary so systems can store and exchange text consistently, unlike image or compression formats.

Why this answer

ASCII (Option B) is a character encoding standard that maps 128 values (0–127) to English letters, digits, punctuation, and control codes, making it a foundational text-encoding scheme. Unicode/UTF-8 (Option E) is also a character encoding standard; Unicode assigns a unique code point to virtually every character in the world's writing systems, and UTF-8 is its variable-length (1–4 byte) encoding form used widely on the web. The other options are not character encodings: MP3 (A) is an audio compression format, JPEG (C) is an image compression standard, and ZIP (D) is a file archive/compression format, none of which define how characters are represented as numeric codes.

Exam trap

The trap is mixing up file formats (MP3, JPEG, ZIP) with character encoding standards; candidates must recognize that only ASCII and Unicode/UTF-8 define how text characters are represented.

Full explanation →

354

MCQhard

A software development team is using Scrum. During a sprint, the product owner introduces a new high-priority requirement that was not in the sprint backlog. The team has already committed to the current sprint's goals. According to Scrum principles, what should the team do?

A.Include the new requirement in the next sprint planning

B.Ask the development team to work overtime to accommodate the new requirement

C.Hold an emergency sprint planning meeting to adjust the sprint backlog

D.Add the new requirement to the current sprint and remove a lower-priority item

AnswerA

New requirements are placed in the product backlog and addressed in future sprints.

Why this answer

In Scrum, the sprint backlog is frozen once the sprint starts; new requirements should be added to the product backlog for future sprints.

Full explanation →

355

MCQeasy

Which of the following is a benefit of using a database instead of a flat file?

A.Simpler setup and configuration

B.Faster file transfer speeds

C.Lower storage requirements

D.Support for concurrent multi-user access

AnswerD

A database engine manages locking, transactions, and isolation so many users can read and write the same records simultaneously without overwriting each other. A flat file offers no such coordination, so concurrent edits corrupt or clobber data. This directly satisfies the stem's concurrent multi-user access benefit.

Why this answer

Databases provide concurrent access control, allowing multiple users to read/write data simultaneously without corruption.

Full explanation →

356

MCQhard

A technician is configuring a small office network with 15 computers. The computers need to share files and a printer. The technician decides to use a topology where each computer is connected to a central device. Which physical topology is being implemented?

A.Ring

B.Mesh

C.Bus

D.Star

AnswerD

A star topology connects every node to a central device such as a switch, satisfying the requirement that each of the 15 computers links to one central point. This centralised arrangement is the defining characteristic distinguishing star from bus, ring or mesh topologies.

Why this answer

The star topology connects each computer directly to a central device, such as a switch or hub. This allows all 15 computers to share files and a printer through the central device, making it the correct choice for the described small office network.

Exam trap

The trap here is that candidates often confuse the logical topology (e.g., Ethernet uses a logical bus) with the physical topology, assuming that because Ethernet uses CSMA/CD, it must be a physical bus, but modern Ethernet networks physically use a star topology with switches.

How to eliminate wrong answers

Option A is wrong because a ring topology connects each computer to two neighbors in a closed loop, requiring data to pass through each device sequentially, which does not use a central device. Option B is wrong because a mesh topology connects each computer to every other computer directly, which is impractical and costly for 15 devices and does not rely on a single central device. Option C is wrong because a bus topology uses a single backbone cable with drop lines to each computer, lacking a central device and being prone to collisions and single-point failures.

Full explanation →

357

MCQmedium

A user's web browser displays a warning that the connection to an online store is not private because the site's certificate cannot be validated. The user asks a technician what the warning means. Which explanation is MOST accurate?

A.The browser cannot verify the identity of the site or that the connection is securely encrypted.

B.The online store is using an outdated version of HTML that the browser no longer supports.

C.The user's internet connection has been disconnected and the page is loading from the cache.

D.The store's website has been infected with malware that is stealing payment information.

AnswerA

Browsers rely on certificates issued by trusted certificate authorities to confirm a site's identity and to establish an encrypted TLS session. When the certificate is expired, self-signed, issued for a different hostname, or chained to an untrusted root, the browser cannot validate it and warns the user. This explanation accurately describes what the warning conveys and why the user should be cautious about entering sensitive data.

Why this answer

A certificate warning means the browser could not validate the site's TLS certificate, so it cannot confirm the site's identity or guarantee an encrypted, trustworthy connection. Causes include expired certificates, hostname mismatches, self-signed certificates, or untrusted issuing authorities. Malware infection, a dropped connection, and outdated HTML do not produce this specific warning, so the accurate explanation is the one describing failed identity and encryption verification.

Exam trap

The trap here is treating every browser security warning as evidence of malware, when certificate errors specifically concern trust validation and encryption of the connection.

Full explanation →

358

MCQeasy

Refer to the exhibit. A user can ping 192.168.1.1 but cannot ping 8.8.8.8. What is most likely the issue?

A.The default gateway is not forwarding traffic to external networks

B.IP address is invalid

C.Subnet mask is incorrect

D.DNS server is not configured

AnswerA

Successful pinging of the local gateway proves the host's IP configuration and local subnet connectivity work. Failure to reach 8.8.8.8 indicates the gateway is not routing traffic beyond the local network, so external forwarding is the fault.

Why this answer

The user can ping the local gateway (192.168.1.1), which confirms that the local IP configuration, subnet mask, and ARP resolution are working correctly. However, the inability to ping 8.8.8.8 (a public IP) indicates that traffic is not being routed beyond the local subnet. The most likely cause is that the default gateway is either misconfigured, down, or not performing IP forwarding to external networks, as the gateway is the router responsible for forwarding packets destined outside the local network.

Exam trap

CompTIA often tests the distinction between local connectivity (Layer 2/3 within subnet) and external routing (Layer 3 beyond the gateway), and the trap here is that candidates confuse DNS resolution with IP reachability, selecting DNS even though the ping uses a raw IP address.

How to eliminate wrong answers

Option B is wrong because an invalid IP address would prevent any successful ping, including to the local gateway; since 192.168.1.1 is reachable, the IP address is valid. Option C is wrong because an incorrect subnet mask would typically cause local communication failures or inability to reach the gateway, but the user can ping the gateway, indicating the subnet mask is correct for the local network. Option D is wrong because DNS is used for name resolution, not for IP-based ping to 8.8.8.8; the ping command uses the IP address directly, so DNS configuration is irrelevant to this issue.

Full explanation →

359

Multi-Selecthard

A company is planning to adopt cloud computing. Which THREE of the following are benefits of using cloud services compared to on-premises infrastructure? (Select THREE).

Select 3 answers

A.Reduced need for hardware maintenance

B.Pay-as-you-go pricing model

C.Full control over physical security

D.On-demand resource provisioning

E.Guaranteed 100% uptime

AnswersA, B, D

The cloud provider owns, patches and replaces the physical servers, storage and networking, so internal staff no longer perform hardware upkeep. This removes the on-premises burden of maintaining equipment, satisfying the reduced-maintenance benefit the question asks for.

Why this answer

Cloud benefits include on-demand resource provisioning (scalability), pay-as-you-go (reduced upfront cost), and reduced maintenance. Guaranteed uptime is not absolute (though SLAs exist), and full control is less in cloud.

Full explanation →

360

MCQhard

Based on the exhibit, which device is directly responsible for separating traffic into VLAN10 and VLAN20?

A.Firewall

B.Internet

C.Router

D.Switch

AnswerD

A switch operates at Layer 2 and assigns access ports to VLANs, tagging frames so traffic is segregated into VLAN10 and VLAN20. It is the device that directly performs this separation, unlike routers which move traffic between subnets or VLANs rather than defining membership.

Why this answer

The switch is directly responsible for separating traffic into VLAN10 and VLAN20 because VLANs are configured at Layer 2 on a switch, using VLAN tagging (IEEE 802.1Q) to isolate broadcast domains. The switch assigns each port to a specific VLAN, ensuring that frames from VLAN10 are not forwarded to VLAN20 ports without a Layer 3 device.

Exam trap

The trap here is that candidates often confuse the switch's role in VLAN creation with the router's role in inter-VLAN routing, assuming the router separates the VLANs when it only routes between them after the switch has already isolated them.

How to eliminate wrong answers

Option A is wrong because a firewall operates at Layer 3 and above, filtering traffic based on IP addresses and ports, but it does not create or separate VLANs—VLAN separation is a Layer 2 function. Option B is wrong because the Internet is an external WAN and has no role in internal VLAN segmentation; it is a network of networks, not a device. Option C is wrong because a router can route between VLANs (inter-VLAN routing) but does not directly separate traffic into VLANs; that separation is performed by the switch at Layer 2 using VLAN membership.

Full explanation →

361

MCQeasy

A user wants to create a presentation with slides, animations, and speaker notes. Which application type should they use?

A.Word processing software.

B.Database software.

C.Spreadsheet software.

D.Presentation software.

AnswerD

Presentation software provides slide layouts, animation timelines and speaker notes as integrated features. The stem requires all three, so a word processor or image editor cannot satisfy it; only presentation software natively supports the combined slide, animation and notes workflow.

Why this answer

Presentation software, such as Microsoft PowerPoint or Google Slides, is specifically designed to create slide-based presentations with multimedia elements like animations, transitions, and speaker notes. The speaker notes feature allows the presenter to see private notes below each slide while the audience views only the slides, which is a core function of this application type.

Exam trap

The trap here is that candidates may confuse word processing software (Option A) as suitable for presentations because it can include images and text, but it lacks slide-based navigation, animation timelines, and dedicated speaker notes functionality.

How to eliminate wrong answers

Option A is wrong because word processing software (e.g., Microsoft Word) is optimized for creating and formatting text documents, not for slide-based presentations with animations or speaker notes. Option B is wrong because database software (e.g., Microsoft Access) is used for storing, querying, and managing structured data, not for creating visual presentations. Option C is wrong because spreadsheet software (e.g., Microsoft Excel) is designed for numerical data analysis, charting, and calculations, lacking native support for slide decks, animations, or speaker notes.

Full explanation →

362

MCQmedium

A digital image is stored in a file that retains all original data without any loss. Later, the file is compressed using a technique that discards some data to reduce file size, but the image quality is lower. Which type of compression was applied?

A.Archive compression

B.Lossless compression

C.File compression

D.Lossy compression

AnswerD

Lossy compression permanently discards data during encoding to shrink file size, which is why the decompressed image shows reduced quality. Lossless techniques such as PNG or ZIP preserve every original pixel, so the observed degradation confirms the lossy method was applied.

Why this answer

Lossy compression permanently discards some data to achieve smaller file sizes, and the resulting image quality is reduced — which matches the scenario where the file was originally lossless but then compressed with quality loss. The question explicitly states that data is discarded and quality is lower, which is the defining characteristic of lossy compression.

Exam trap

The trap is that candidates may confuse 'archive compression' with lossy compression because ZIP archives are common, but ZIP is lossless; the key is to focus on the phrase 'discards some data' which unambiguously points to lossy.

How to eliminate wrong answers

Option A is wrong because 'archive compression' is not a standard compression category; archiving typically uses lossless compression (e.g., ZIP) to preserve data integrity. Option B is wrong because lossless compression retains all original data and allows perfect reconstruction, which contradicts the scenario's quality loss. Option C is wrong because 'file compression' is a generic term that does not specify whether data is lost; it does not describe the specific technique that discards data.

Full explanation →

363

MCQmedium

Which of the following best describes the function of an operating system?

A.Encrypts all data on the computer

B.Controls hardware and provides a user interface

C.Manages only file storage

D.Provides internet connectivity

AnswerB

An operating system directly manages hardware resources—CPU scheduling, memory allocation, device drivers—while exposing a user interface for interaction. This satisfies the stem's requirement to describe the OS's core function, distinguishing it from application software, which relies on the OS rather than controlling hardware itself.

Why this answer

The operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Its core functions include process management, memory management, device management, and providing a user interface (such as a command-line interface or graphical user interface) for interaction. Without an OS, a user cannot directly control hardware or run application software.

Exam trap

The trap here is that candidates often confuse a specific feature (like encryption or internet connectivity) with the OS's fundamental purpose, leading them to pick a narrow or secondary function instead of the broad, correct definition of hardware control and user interface provision.

How to eliminate wrong answers

Option A is wrong because encryption is not a core function of an operating system; while some OSes include encryption tools (e.g., BitLocker, FileVault), the primary role of the OS is not to encrypt all data, and encryption is an optional security feature, not a fundamental OS function. Option C is wrong because managing only file storage is too narrow; the OS manages much more, including processes, memory, devices, and security, not just files. Option D is wrong because providing internet connectivity is typically handled by network interface hardware and drivers, not the OS itself; the OS provides networking stacks (e.g., TCP/IP) and APIs, but connectivity is a service built on top of the OS, not its defining function.

Full explanation →

364

MCQhard

A developer wants to install a Linux application on a system that uses the Debian package manager. Which package format should the developer look for?

A..deb

B..msi

C..rpm

D..pkg

AnswerA

The .deb format is the native package archive for Debian-based systems, installed via dpkg or apt. Since the stem specifies a system using the Debian package manager, .deb directly satisfies that constraint, unlike .rpm (Red Hat) or source tarballs, which require different tooling.

Why this answer

Debian-based Linux distributions (Debian, Ubuntu) use the dpkg package manager and .deb package format. A developer installing software on such a system should look for .deb packages, which can be installed with dpkg or apt.

Exam trap

FC0-U71 often tests package format-to-distribution mapping, so candidates confuse .rpm (Red Hat) with .deb (Debian) or pick .msi/.pkg by pattern-matching 'installer'.

How to eliminate wrong answers

Option B is wrong because .msi is the Microsoft Installer format used on Windows, not Linux. Option C is wrong because .rpm is the package format for Red Hat-based distributions (RHEL, Fedora, CentOS) using the RPM package manager. Option D is wrong because .pkg is the macOS installer package format, not used on Linux.

Full explanation →

365

MCQmedium

A user is concerned about losing edits to a document if the power fails. Which type of memory is the document most likely stored in while being edited?

A.Cache

B.HDD

C.RAM

D.ROM

AnswerC

RAM is volatile, holding the document's working data and unsaved edits in active memory; a power failure clears it, losing anything not yet written to disk. Non-volatile storage such as an SSD or HDD retains saved content.

Why this answer

While a document is being actively edited, it resides in RAM because RAM is the volatile working memory the CPU reads and writes during application use. If power fails, RAM contents are lost, which is exactly the user's concern. The document is only persisted to the HDD when saved.

Exam trap

The trap is confusing where data lives during editing versus where it is stored permanently; candidates may pick HDD because that is where the file is saved, but unsaved edits exist only in volatile RAM.

How to eliminate wrong answers

Option A is wrong because cache is a small, fast memory holding frequently accessed data for the CPU, not the primary storage for an open document. Option B is wrong because the HDD is non-volatile storage where the file is saved; unsaved edits are not there yet. Option D is wrong because ROM is read-only memory holding firmware, not user documents.

Full explanation →

366

MCQeasy

Which of the following is an example of a PAN (Personal Area Network) technology?

A.Bluetooth

B.Cellular

C.Wi-Fi

D.Ethernet

AnswerA

Bluetooth operates over short-range radio links, typically within ten metres, connecting personal devices such as headphones, keyboards and phones to one user's handset. This satisfies the PAN constraint of a single person's immediate workspace, unlike LAN or WAN technologies that span buildings or wider geographic areas.

Why this answer

Bluetooth is a short-range wireless technology designed to connect devices within a person's immediate vicinity (typically 10 meters or less), which is the defining characteristic of a Personal Area Network (PAN). It operates in the 2.4 GHz ISM band using frequency-hopping spread spectrum and is used for peripherals like headsets, keyboards, and smartphones. This makes it the textbook example of PAN technology.

Exam trap

FC0-U71 often tests the boundary between PAN, LAN, and WAN by offering familiar wireless technologies like Wi-Fi and cellular, hoping candidates confuse 'wireless' with 'personal area' and pick Wi-Fi instead of Bluetooth.

How to eliminate wrong answers

Option B is wrong because cellular networks (3G/4G/5G) are Wide Area Networks (WANs) that rely on carrier infrastructure and cell towers spanning cities or regions, not a personal workspace. Option C is wrong because Wi-Fi is typically classified as a Wireless Local Area Network (WLAN) covering a home, office, or campus — larger than a PAN. Option D is wrong because Ethernet is a wired Local Area Network (LAN) technology using IEEE 802.3, designed for building-level connectivity, not personal device pairing.

Full explanation →

367

Multi-Selecteasy

Which TWO of the following are best practices for password security?

Select 2 answers

A.Enabling multi-factor authentication whenever possible

B.Using simple patterns like '123456' or 'password'

C.Using the same password for multiple accounts

D.Sharing passwords with coworkers for convenience

E.Using a password manager to generate and store strong passwords

AnswersA, E

Multi-factor authentication demands a second, independent factor beyond the password, so a stolen or guessed credential alone cannot grant access. This directly satisfies the password-security best-practice requirement by neutralising credential theft, replay and brute-force success.

Why this answer

Option A is correct because enabling multi-factor authentication (MFA) adds a second verification factor (something you have, such as a TOTP code or hardware token, or something you are, such as a fingerprint) on top of the password, so a stolen or guessed password alone is no longer sufficient to compromise the account. Option E is correct because a password manager generates high-entropy, unique passwords for each account and stores them encrypted (typically with AES-256) behind a single strong master passphrase, which eliminates password reuse and makes credential stuffing attacks ineffective. The remaining options are poor practices: B uses trivially guessable patterns that appear at the top of every breach wordlist, C enables credential stuffing and lateral movement because one breach exposes all accounts, and D destroys individual accountability and non-repudiation while widening the attack surface to every person who knows the shared secret.

Exam trap

FC0-U71 often tests the misconception that complex-looking but reused passwords are secure — candidates overlook that uniqueness and MFA matter more than raw complexity.

Full explanation →

368

Multi-Selecteasy

Which TWO of the following are common types of network cables used in wired Ethernet networks?

Select 2 answers

A.HDMI

B.Coaxial

C.Cat5e

D.USB

E.Fiber optic

AnswersC, E

Cat5e is a standard twisted-pair cable for Ethernet networks.

Why this answer

Cat5e (Category 5 enhanced) is a twisted-pair copper cable standard that supports Gigabit Ethernet (1000BASE-T) up to 100 meters. It is one of the most common cable types for wired Ethernet networks because it provides sufficient bandwidth (up to 1000 Mbps) and is backward compatible with older 10/100 Mbps standards.

Exam trap

The trap here is that candidates often confuse coaxial cable's historical use in Ethernet (e.g., 10BASE2) with modern wired Ethernet standards, forgetting that today's common Ethernet deployments use twisted-pair (Cat5e/Cat6) or fiber, not coax.

Full explanation →

369

MCQeasy

A company needs to store customer orders and ensure that each order is uniquely identified. Which database concept should be used?

A.Constraint

B.Index

C.Foreign key

D.Primary key

AnswerD

A primary key enforces uniqueness on one or more columns and rejects duplicate or null values, so every customer order row is uniquely identified. It satisfies the stated requirement for guaranteed unique identification, unlike other keys or indexes that permit duplicates or serve only performance purposes.

Why this answer

A primary key is a column (or set of columns) that uniquely identifies each row in a table, which is exactly what is needed to ensure each customer order has a unique identifier. Primary keys enforce uniqueness and cannot contain NULL values, guaranteeing every order record is distinguishable.

Exam trap

The trap is confusing the general concept of a constraint with the specific primary key constraint — candidates must recognize that while a primary key is a constraint, the question asks for the concept that uniquely identifies each row, which is the primary key.

How to eliminate wrong answers

Option A is wrong because a constraint is a general rule (e.g., NOT NULL, UNIQUE, CHECK) — while a primary key is a type of constraint, 'constraint' alone is too broad and does not specifically guarantee unique identification. Option B is wrong because an index improves query performance but does not enforce uniqueness unless it is a unique index, and it is not the identifying mechanism itself. Option C is wrong because a foreign key references a primary key in another table to establish a relationship; it does not uniquely identify rows in its own table.

Full explanation →

370

MCQhard

A company uses a cloud database service where the provider automatically handles backups, patching, and scaling. This deployment model is known as:

A.Database as a Service (DBaaS)

B.Platform as a Service (PaaS)

C.Software as a Service (SaaS)

D.Infrastructure as a Service (IaaS)

AnswerA

DBaaS is the managed cloud model where the provider handles backups, patching, and scaling, exactly matching the stem's described responsibilities. IaaS leaves patching and scaling to the customer, while SaaS delivers finished applications rather than a managed database engine.

Why this answer

Database as a Service (DBaaS) is a cloud service model where the provider manages the database infrastructure, including backups, patching, scaling, and high availability, while the customer focuses on data and queries. This matches the scenario where the provider automatically handles those operational tasks. DBaaS is a specialized form of PaaS focused on database engines.

Exam trap

FC0-U71 often tests the boundaries between IaaS, PaaS, SaaS, and DBaaS, and candidates confuse DBaaS with PaaS because both are managed platforms; the key differentiator is that DBaaS specifically delivers a managed database engine.

How to eliminate wrong answers

Option B is wrong because PaaS provides a platform for developing, running, and managing applications (e.g., app servers, runtimes) but does not specifically deliver a managed database service with automated backups and scaling as its core offering. Option C is wrong because SaaS delivers fully functional applications to end users (e.g., Salesforce, Gmail), not a database environment for the customer to build on. Option D is wrong because IaaS provides raw compute, storage, and networking (e.g., VMs), leaving the customer responsible for installing, patching, and backing up the database.

Full explanation →

371

MCQmedium

Which of the following is an example of a NoSQL database that stores data as JSON-like documents?

A.MySQL

B.MongoDB

C.PostgreSQL

D.SQLite

AnswerB

MongoDB stores records as BSON documents, a binary JSON-like format, satisfying the stem's requirement for a document-oriented NoSQL database. Unlike key-value stores such as Redis or column-family databases such as Cassandra, it organises data into flexible, schema-less documents, making it the archetypal example of the document model.

Why this answer

MongoDB is a document-oriented NoSQL database that stores data in BSON (Binary JSON) documents, making it the canonical example of a JSON-like document store. It allows flexible, schema-less documents and is widely used for content management, catalogs, and real-time analytics.

Exam trap

The trap is assuming that any database with JSON support (like MySQL or PostgreSQL) qualifies as a NoSQL document store — candidates must remember that NoSQL document databases like MongoDB store data natively as JSON-like documents, whereas relational databases only add JSON as a feature.

How to eliminate wrong answers

Option A is wrong because MySQL is a relational (SQL) database that stores data in tables with fixed schemas, not JSON-like documents (though it has limited JSON support, it is not a NoSQL document store). Option C is wrong because PostgreSQL is also a relational database; while it supports JSONB, it is fundamentally an RDBMS, not a NoSQL document database. Option D is wrong because SQLite is an embedded relational database that uses tables and SQL, not a document-oriented NoSQL store.

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372

Multi-Selectmedium

Which TWO concerns are most critical when selecting a backup method? (Select exactly two.)

Select 2 answers

A.Recovery time objective

B.Network topology

C.Data size

D.Display resolution

E.Operating system version

AnswersA, C

RTO defines the maximum acceptable downtime for restoring data, critical for business continuity.

Why this answer

Recovery time objective (RTO) is critical because it defines the maximum acceptable downtime after a failure, directly influencing the choice of backup method (e.g., full vs. incremental) and storage medium (e.g., local disk vs. cloud). A shorter RTO requires faster restoration, often necessitating more frequent backups or technologies like snapshots or replication.

Exam trap

CompTIA often tests the distinction between operational metrics (RTO, RPO, data size) and unrelated hardware/software specifications (display resolution, OS version) to see if candidates can identify which factors truly drive backup strategy decisions.

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373

MCQmedium

A technician is troubleshooting a computer that fails to boot. The technician checks the system's low-level software stored on a chip on the motherboard. Which type of software is being inspected?

A.Firmware

B.Device driver

C.Application software

D.Operating system

AnswerA

Firmware is low-level software stored on a motherboard chip, typically a ROM or flash memory device, that initialises hardware and starts the boot process. Inspecting it directly addresses the stem's constraint: software residing on a chip rather than on disk, which is exactly what the technician examines when a computer fails to boot.

Why this answer

Firmware is low-level software stored on a chip (such as a ROM, EEPROM, or flash chip) on the motherboard that provides basic control of hardware and initializes the system during boot. The BIOS/UEFI is a prime example of firmware, so inspecting the chip on the motherboard means inspecting firmware. This is distinct from drivers, applications, and the OS, which reside on storage devices.

Exam trap

The trap is that candidates may think 'low-level software on a chip' refers to a device driver because drivers are also low-level, but drivers are stored on disk and loaded by the OS, whereas firmware is embedded on the motherboard.

How to eliminate wrong answers

Option B is wrong because a device driver is software installed in the operating system to control a specific hardware device, not stored on a motherboard chip. Option C is wrong because application software runs on top of the OS and is stored on disk, not in a motherboard chip. Option D is wrong because the operating system is a large software suite stored on a hard drive or SSD, not on a low-level chip on the motherboard.

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374

MCQhard

A technician is setting up a new computer on a network. The computer receives an IP address of 169.254.1.5. Which of the following is the most likely issue?

A.The network cable is faulty

B.The DNS server is unreachable

C.The gateway is misconfigured

D.The DHCP server is unavailable

AnswerD

The 169.254.x.x range is APIPA, which Windows self-assigns when no DHCP server responds to lease requests. The client cannot obtain a valid address, so the most likely cause is an unreachable or failed DHCP server, not a DNS or gateway fault.

Why this answer

The IP address 169.254.1.5 falls within the Automatic Private IP Addressing (APIPA) range (169.254.0.0/16), which Windows automatically assigns when a DHCP client fails to receive an IP lease from a DHCP server. This indicates that the DHCP server is either unreachable or not responding, making D the correct answer.

Exam trap

The trap here is that candidates often confuse APIPA with a DNS or gateway problem, but APIPA is a direct indicator of DHCP failure, not name resolution or routing issues.

How to eliminate wrong answers

Option A is wrong because a faulty network cable would typically cause a link light failure or complete lack of connectivity, but the computer still obtained an APIPA address, which requires a functional physical layer to send DHCP discovery broadcasts. Option B is wrong because DNS server unreachability does not prevent DHCP lease assignment; DNS is a separate service used for name resolution after IP configuration is complete. Option C is wrong because a misconfigured gateway affects routing beyond the local subnet, but the computer would still receive a valid DHCP lease if the DHCP server were available; APIPA only occurs when no DHCP server responds.

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375

MCQeasy

Which of the following is an example of a strong password?

A.123456

B.Cr@zy8#s

C.abc123

D.password

AnswerB

Length plus mixed character classes drives brute-force resistance. "Cr@zy8#s" combines upper and lower case letters, digits and symbols, defeating dictionary and simple rule-based cracking attempts, whereas single-case words or short numeric strings fall quickly to automated guessing.

Why this answer

(Cr@zy8#s) is correct because it meets all strong password criteria: it is at least 8 characters long, includes uppercase and lowercase letters, a digit, and special characters (@ and #). This complexity makes it resistant to brute-force attacks and dictionary attacks, as it increases the entropy and does not contain common words or sequential patterns.

Exam trap

The trap here is that candidates often choose passwords like 'abc123' or '123456' because they seem easy to remember, but the exam tests the understanding that a strong password must include a mix of character types and avoid common patterns or dictionary words.

How to eliminate wrong answers

Option A is wrong because '123456' is a sequential numeric string that is one of the most commonly used passwords, making it trivial to guess or crack with a simple brute-force attack. Option C is wrong because 'abc123' combines a common alphabetical sequence with a numeric sequence, lacks special characters and uppercase letters, and is frequently found in password dictionaries. Option D is wrong because 'password' is a single common English word that is the most classic example of a weak password, easily guessed by dictionary attacks and appearing in every password cracking list.

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CompTIA Tech+ (FC0-U71) (FC0-U71) — Questions 301–375