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Which of the following makes a file readable only by select users who possess a key?
Encryption protects files by converting them into unreadable formats unless the correct decryption key is provided. The CompTIA ITF+ FC0-U71 Official Study Guide explains:
'Encryption is the process of converting data into a secure format that cannot be read without a decryption key. Only users with the proper key can access the original data.'
File permissions control user access based on OS-level rules, but encryption specifically ensures that only those with the key can read the file even if they access the file storage.
Hidden folders merely conceal files but don't protect content. Compression reduces file size but doesn't protect access.
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Which of the following is used for predictive text?
Artificial intelligence (AI) powers predictive text by analyzing user input patterns and language models to suggest likely words or phrases.
''AI enables predictive text by using language models and historical input to forecast what the user intends to type next.'' --- CompTIA ITF+ Emerging Technologies
Correct answe r: C
A programmer is writing an application that directly interfaces with machine code. Which of the following languages is the programmer using?
The correct answer is C. Assembly. Assembly language is the lowest-level language listed and is closest to machine code. It allows developers to write instructions that are translated into executable machine code. Scripting languages automate or run interpreted tasks, markup languages structure content such as web pages, and query languages are used to interact with databases.
Exact Extract/Reference: The CompTIA Tech+ Study Guide states that ''assembly language is the lowest level of code in which people can write'' and that it ''allows the developer to provide instructions directly to the hardware.'' It also states that assembly is translated into executable machine code by an assembler.
A user plugs a new scanner into a computer and turns it on. The scanner is automatically detected. However, the OS will only respond to some, but not all, of the buttons on the scanner. Which of the following steps should the user take next to enable full functionality?
Although basic scanner functionality may work with default drivers, full functionality (like programmable buttons) often requires the manufacturer's software suite. Installing the correct software from the vendor ensures that all features are supported.
''Peripheral devices may require manufacturer-specific drivers and utilities to enable full feature support. Downloading from the vendor's website ensures compatibility.'' --- CompTIA ITF+
A user logs in with the same credentials across multiple websites. Which of the following password policies would most likely prevent this practice?
A password reuse policy prevents users from using the same password across multiple platforms or reusing previously used passwords. This is a best practice to reduce the risk of credential stuffing attacks.
''Password reuse policies help ensure users do not reuse old or existing passwords across multiple platforms, reducing exposure from compromised accounts.'' --- CompTIA ITF+ Security Objectives
Correct answe r: A
172 questions covering all exam domains, starting from $20
Exam domains verified against: Official CompTIA FC0-U71 exam guide, last checked August 2026.
Learn the language of IT including computing basics of input, processing, output and storage. Study binary, hexadecimal, decimal and octal notational systems and how they work in computer architecture. Understand units of measurement for storage capacity, processing speed and network throughput. Master troubleshooting methodology by learning to identify problems, test theories, implement solutions and document your findings.
Sample question from this domain above: Q2
Explore computing devices from smartphones and tablets to servers, IoT devices and gaming consoles. Learn internal components like motherboards, CPUs, RAM, storage devices and network interfaces. Understand volatile versus non-volatile storage, local networks versus cloud storage and how virtualization fits in. Study peripheral setup for printers and scanners, device interfaces like USB and Ethernet, networking basics including routers and firewalls, and wireless standards.
Study operating systems across mobile, desktop, server and embedded environments. Learn file systems like NTFS and FAT32, graphical and command-line interfaces, utilities and drivers. Examine software types including productivity tools, collaboration apps and web browsers plus their security features. Understand artificial intelligence applications like chatbots and generative AI tools.
Sample question from this domain above: Q4
Discover programming languages that are interpreted, compiled, scripted, markup-based and assembly-level. Learn data types including characters, strings, integers, floats and Boolean values. Study programming concepts like variables, constants, arrays, functions and objects. Explore organizational techniques such as pseudocode, flowcharts and object-oriented methods including branching and looping.
Sample question from this domain above: Q3
Understand why data matters for making decisions, generating reports and creating business value. Learn relational and non-relational database structures including tables, rows, fields and the keys that link them together. Study how to query databases, create reports and scale storage locally or in the cloud. Master backup concepts including file backups, system backups and choosing between local and cloud storage options.
Master the pillars of security including confidentiality, integrity and availability plus authentication and authorization. Learn device security practices like using anti-malware, firewalls, patches and physical security measures. Study password best practices including length, complexity and the role of password managers. Understand encryption for data at rest and in transit, HTTPS connections, VPNs and mobile device security.
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