FC0-U71 Practice Test 17 — 15 Questions

Question 1

Which software license allows a user to install the software on multiple computers for personal use?

Accepted Answer

Personal license. A personal license grants a single user the right to install the software on multiple devices they own or control, typically for non-commercial use. This is distinct from a per-seat license, which limits installation to one computer per license key. The key differentiator is that the license is tied to the user, not the machine count.

Answer

Trial version

Answer

Enterprise license

Answer

Open source license

Question 2

A company is developing a mobile app and wants to ensure it works on both iOS and Android without writing separate codebases. Which approach should be used?

Accepted Answer

Cross-platform development. Cross-platform development allows a single codebase (e.g., using frameworks like React Native, Flutter, or Xamarin) to compile into native apps for both iOS and Android, eliminating the need to write separate codebases for each platform. This approach leverages shared logic and UI components while still producing platform-specific binaries that can access native device features.

Answer

Native development

Answer

Web-based development

Answer

Cloud-based development

Question 3

A technician needs to install a wireless network in a large warehouse. The goal is to minimize interference and support many devices. Which frequency band is best for this scenario?

Accepted Answer

5 GHz. The 5 GHz frequency band is best for a large warehouse with many devices because it offers more non-overlapping channels, higher data rates, and less interference from common sources like microwaves and Bluetooth. While 5 GHz has shorter range than 2.4 GHz, in a warehouse, multiple access points can be deployed to provide coverage, and the reduced interference supports many devices simultaneously.

Answer

60 GHz

Answer

900 MHz

Answer

2.4 GHz

Question 4

An e-commerce application experiences a data anomaly where an order is partially recorded: the order header is saved but some order line items are missing due to a system crash. Which property of database transactions is violated?

Accepted Answer

Atomicity. Atomicity ensures that a transaction is treated as a single, indivisible unit of work: either all operations (e.g., saving the order header and all line items) complete successfully, or none are applied. In this scenario, the system crash caused a partial write, leaving the order header committed while line items were lost, which directly violates atomicity. The database should have rolled back the entire transaction upon crash recovery, preventing the partial state.

Answer

Consistency

Answer

Isolation

Answer

Durability

Question 5

A company has a server that hosts a critical database. The server uses RAID 5 with three disks. One disk fails. What is the immediate impact on data availability?

Accepted Answer

Data is still available, but performance may degrade. RAID 5 uses block-level striping with distributed parity. With three disks, the array can tolerate a single disk failure without data loss because the parity information on the remaining two disks can reconstruct the missing data on the fly. Therefore, data remains fully available immediately after one disk fails, though read and write performance may degrade due to the overhead of parity calculation and reconstruction.

Answer

Data is available only after replacing the disk

Answer

The server will shut down

Answer

All data on the array is lost

Question 6

Which printer technology is most suitable for printing high-volume black-and-white text documents in an office environment due to its lower cost per page?

Accepted Answer

Laser. Laser printers are the standard choice for high-volume monochrome office printing because their toner-based electrophotographic process yields a very low cost per page and high speed. Toner cartridges last for thousands of pages, and laser printers handle continuous duty cycles far better than inkjet or thermal units. This makes them the most economical option for text-heavy black-and-white documents.

Answer

Inkjet

Answer

Thermal

Answer

Impact

Question 7

A user wants to edit a plain text configuration file on a Linux system. Which type of application is most appropriate?

Accepted Answer

Text editor. A text editor is the correct tool for editing plain text configuration files on Linux because it saves files without formatting, hidden characters, or proprietary markup. Editors like vi, nano, and emacs preserve the exact bytes needed for config files such as /etc/fstab or sshd_config. Using anything that adds formatting would corrupt the file and break the service.

Answer

Integrated Development Environment (IDE)

Answer

Word processor

Answer

Media player

Question 8

A developer needs to represent the logic of a program that decides whether a user is eligible for a discount. The process includes conditions (e.g., 'is member?') and actions (e.g., 'apply 10% discount'). Which tool would best visually represent this logic using standardized symbols like diamonds for decisions and rectangles for processes?

Accepted Answer

Flowchart. A flowchart uses standardized symbols—diamonds for decisions, rectangles for processes, parallelograms for input/output, and ovals for start/end—to visually represent program logic and control flow. It is the canonical tool for depicting conditional branching such as eligibility checks and resulting actions.

Answer

Pseudocode

Answer

Data flow diagram

Answer

UML class diagram

Question 9

A developer writes code to store a collection of employee names in a structure that allows adding names at the end and removing names from the front, following a first-in-first-out (FIFO) order. Which data structure is the developer implementing?

Accepted Answer

Queue. A queue is a linear data structure that follows First-In-First-Out (FIFO) order, where elements are added at the rear (enqueue) and removed from the front (dequeue). This exactly matches the requirement of adding names at the end and removing them from the front.

Answer

Tree

Answer

Array

Answer

Stack

Question 10

A company needs to ensure that all employees can collaborate on documents in real time. Which type of software should the company choose?

Accepted Answer

Cloud-based document editing suite.. A cloud-based document editing suite (e.g., Microsoft 365, Google Workspace) enables real-time co-authoring, where multiple users can edit the same document simultaneously, see each other's changes live, and rely on automatic versioning and cloud storage. This directly satisfies the requirement for real-time collaboration.

Answer

Word processor with local file saving.

Answer

Version control system like Git.

Answer

Email attachment sharing.

Question 11

Which TWO of the following are types of system software? (Select two.)

Accepted Answer

Operating system. The operating system (B) is the core system software that manages hardware resources, provides services for application programs, and acts as an intermediary between the user and the computer hardware. Device drivers (D) are system software that allow the operating system to communicate with and control specific hardware devices, such as a graphics card or network adapter.

Answer

Database management system

Answer

Web browser

Answer

Word processor

Question 12

A user is unable to insert a new record into a database table because a required field is missing. Which database concept enforces that a field must have a value?

Accepted Answer

NOT NULL constraint. A NOT NULL constraint is a database rule that prevents a field from containing a NULL value, ensuring that a value must be provided for that column when inserting or updating a record. In this scenario, the user cannot insert a new record because the required field is missing, which directly violates the NOT NULL constraint. This constraint is enforced at the database engine level, typically during the INSERT or UPDATE operation, and will raise an error if the field is omitted or set to NULL.

Answer

Primary key

Answer

Index

Answer

Foreign key

Question 13

A web application constructs SQL queries by concatenating user input directly. What is the primary security risk?

Accepted Answer

SQL injection. When a web application constructs SQL queries by concatenating user input directly, an attacker can inject malicious SQL code into the query. This allows the attacker to manipulate the database, such as by bypassing authentication, retrieving unauthorized data, or executing arbitrary commands. This is the classic definition of SQL injection, which exploits the lack of input sanitization or parameterized queries.

Answer

Denial of service

Answer

Cross-site scripting

Answer

Buffer overflow

Question 14

A software company uses a development model where work is divided into 2-week sprints. Each sprint begins with a planning meeting, includes daily standups, and ends with a review and retrospective. A product owner prioritizes features, and a scrum master facilitates the process. Which methodology is being used?

Accepted Answer

Scrum. Scrum is an agile framework that uses sprints, daily standups, sprint reviews, and specific roles (product owner, scrum master, development team).

Answer

Kanban

Answer

Waterfall

Answer

Extreme Programming (XP)

Question 15

Which THREE of the following are common troubleshooting steps? (Select THREE).

Accepted Answer

Identify the problem. Identifying the problem is the first step in the CompTIA A+ troubleshooting methodology. Without clearly defining symptoms and scope, subsequent steps lack direction. This step involves gathering information from users, duplicating the issue, and identifying any recent changes to the system.

Answer

Install new software

Answer

Escalate to vendor immediately