CompTIA Tech+ FC0-U71 Practice Test 20

Correct Answer: Implement the solution
Explanation: Implementing the solution is the step where the identified fix is applied to resolve the issue. Gathering information, establishing and testing theories, and documenting findings are other steps in the process.

Correct Answer: Source code is publicly available
Explanation: Open source software provides publicly accessible source code, allowing modification and distribution. It typically does not require paid licenses, is not limited to enterprises, and is not pre-installed unless specified.

Correct Answer: DNS
Explanation: DNS (Domain Name System) translates domain names (e.g., www.example.com) to IP addresses. FTP transfers files, SNMP manages networks, POP3 retrieves email, and SSH provides secure remote access.

Correct Answer: To process visual data and rendering
Explanation: A GPU handles rendering images, videos, and animations, optimizing visual processing. It does not manage networks, store files, execute queries, or allocate memory, which are tasks for other components.

Correct Answer: Patch management
Explanation: Patch management involves applying software updates to fix vulnerabilities. User training educates staff, encryption protects data, segmentation isolates networks, and access control restricts permissions.

Correct Answer: Reduces data redundancy
Explanation: Normalization organizes a database to eliminate redundant data, improving efficiency and consistency. It does not increase storage, simplify authentication, enhance network speed, or compress files.

Correct Answer: Conditional statement
Explanation: Conditional statements (e.g., if-else) execute code based on whether conditions are true or false. Arrays store data, functions perform tasks, variables hold values, and classes define objects.

Correct Answer: The amount of data transmitted per unit time
Explanation: Bandwidth measures the data transfer rate, typically in bits per second. It is unrelated to cable length, device count, power consumption, or encryption strength.

Correct Answer: Web application
Explanation: Web applications run in a browser, requiring no local installation. Desktop applications run locally, mobile apps are for devices, firmware controls hardware, and utility apps perform system tasks.

Correct Answer: To identify a device on a network
Explanation: A MAC address is a unique hardware identifier for a device on a network, used at the data link layer. It does not assign IPs, encrypt packets, prioritize traffic, or store configurations.

Correct Answer: Keyboard
Explanation: A keyboard is an input device, allowing users to send data to the system. Printers, monitors, speakers, and projectors are output devices, as they receive and display data from the system.

Correct Answer: Encryption
Explanation: Encryption scrambles data during transmission to prevent unauthorized access. Compression reduces size, backups preserve data, defragmentation optimizes storage, and patching fixes software, but none secure transmission.

Correct Answer: Hierarchical
Explanation: The hierarchical database model organizes data in a tree-like structure with parent-child relationships. Relational uses tables, network allows complex relationships, NoSQL uses flexible structures, and flat-file uses simple files.

Correct Answer: To execute code repeatedly
Explanation: A loop repeats a block of code until a condition is met, enabling repetitive tasks. It does not define variables, create interfaces, connect to databases, or secure traffic, which are handled by other programming constructs or systems.

Correct Answer: Infrastructure as a Service (IaaS)
Explanation: IaaS provides virtualized computing resources like servers, storage, and networking. SaaS delivers software, PaaS provides development platforms, FaaS offers serverless computing, and DaaS provides virtual desktops.

Correct Answer: Dynamic Host Configuration Protocol
Explanation: DHCP automatically assigns IP addresses and network configuration to devices on a network. The other options are not recognized IT terms.

Correct Answer: Hypervisor
Explanation: A hypervisor manages virtual machines by allocating resources and isolating virtual environments. Compilers translate code, debuggers identify errors, text editors write code, and file compressors reduce file sizes, none of which manage VMs.

Correct Answer: No moving parts
Explanation: SSDs use flash memory and have no moving parts, resulting in faster access times and greater durability compared to HDDs, which use spinning disks. SSDs typically have lower latency, are smaller, cost more per gigabyte, and offer faster read speeds.

Correct Answer: Motherboard
Explanation: The motherboard’s chipset and memory slots determine the maximum amount and type of RAM a system can support. The CPU affects performance, the power supply provides electricity, storage drives hold data, and the graphics card handles visual output.

Correct Answer: To connect a device to a network
Explanation: A NIC enables a device to connect to a network, facilitating communication via wired or wireless connections. It does not manage software, cool components, store data, or execute instructions, which are handled by other hardware or software.