CompTIA Tech+ FC0-U71 Practice Test

Correct Answer: Heat sink

Explanation: A heat sink dissipates heat from the CPU to prevent overheating, often paired with a fan. The power supply provides electricity, the motherboard connects components, expansion cards add functionality, and optical drives read discs.

Correct Answer: To track changes and collaborate on code

Explanation: Version control systems (e.g., Git) track code changes and enable collaboration among developers. They do not affect CPU speed, encrypt code, manage bandwidth, or install applications.

Correct Answer: SELECT

Explanation: The SELECT operation retrieves specific data from a database table based on criteria. INSERT adds data, UPDATE modifies data, DELETE removes data, and JOIN combines tables.

Correct Answer: To create secure network connections

Explanation: A VPN (Virtual Private Network) creates encrypted connections over the internet, ensuring secure data transmission. It does not scan for malware, manage licenses, optimize CPUs, or compress data.

Correct Answer: Magnetic tape

Explanation: Magnetic tape is cost-effective and durable for long-term data archiving. RAM and cache are volatile, flash drives are portable but less durable, and SSDs are used for primary storage, not archiving.

Correct Answer: To specify the kind of data a variable can hold

Explanation: Data types define what kind of data (e.g., integer, string) a variable can store, ensuring proper handling. They are unrelated to user interfaces, network connections, backups, or encryption.

Correct Answer: Denial of Service (DoS)

Explanation: A DoS attack floods a system with traffic to disrupt its availability. Phishing tricks users, man-in-the-middle intercepts data, SQL injection targets databases, and social engineering manipulates people, not systems.

Correct Answer: Basic Input/Output System

Explanation: BIOS (Basic Input/Output System) initializes hardware during startup and provides basic communication between the OS and hardware. The other options are not standard IT terms.

Correct Answer: SMTP

Explanation: SMTP (Simple Mail Transfer Protocol) is used to send emails. POP3 and IMAP retrieve emails, DNS resolves domain names, and DHCP assigns IP addresses.

Correct Answer: To document program logic

Explanation: Flowcharts visually represent program logic and processes, aiding in planning and communication. They are not used for debugging, compiling, encrypting, or memory management.

Correct Answer: Switch

Explanation: A switch connects multiple devices in a local network, directing data traffic between them. Modems connect to ISPs, gateways link different networks, repeaters extend signal range, and access points enable wireless connections.

Correct Answer: To provide on-demand IT resources

Explanation: Cloud computing delivers scalable IT resources like storage and computing power over the internet, reducing the need for local hardware. It does not manage physical hardware, install OS locally, replace cables, or configure firewalls directly.

Correct Answer: Object-oriented

Explanation: Object-oriented programming (OOP) uses objects, which combine data and methods, to model real-world entities and their interactions. Procedural focuses on procedures, functional on functions, event-driven on events, and logic-based on logical rules.

Correct Answer: To establish relationships between tables

Explanation: A foreign key in one table references the primary key in another, linking them to maintain relational integrity. It does not sort data, create tables, delete duplicates, or index data, which are handled by other database functions.

Correct Answer: Patch

Explanation: A patch is a software update designed to fix security vulnerabilities or bugs. Feature updates add functionality, driver updates improve hardware compatibility, firmware updates enhance device functionality, and application updates may include new features or fixes.

Correct Answer: Graphical User Interface

Explanation: GUI stands for Graphical User Interface, allowing users to interact with systems through visual elements like windows and icons. The other options are not standard IT terms.

Correct Answer: Twisted pair

Explanation: Twisted pair cables, such as Cat5e or Cat6, are widely used for high-speed Ethernet connections in LANs due to their affordability and performance. Fiber optic is used for longer distances, coaxial for cable modems, and serial/parallel cables for older devices.

Correct Answer: To simulate a physical computer environment

Explanation: A virtual machine emulates a physical computer, running an operating system and applications in an isolated environment on a host system. It does not manage bandwidth, compress files, scan for viruses, or create database queries.

Correct Answer: Hertz

Explanation: CPU speed is measured in Hertz (Hz), typically gigahertz (GHz), indicating the number of cycles per second. Gigabytes measure storage, watts measure power consumption, bits measure data size, and volts measure electrical potential.

Correct Answer: To connect multiple networks

Explanation: A router connects multiple networks, such as a local network to the internet, by forwarding data packets based on IP addresses. It does not store packets, encrypt traffic, manage updates, or authenticate users, which are functions of other devices or software.