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A user finds a USB device and plugs it into a laptop. The laptop does not detect the USB device. Which of the following is the most likely cause of this issue?
If a USB port is disabled in the BIOS or device manager, the system won't detect devices connected to it. This is the most likely cause if nothing happens when a USB device is inserted.
''Hardware ports can be disabled via firmware settings or device policies, which prevents detection of peripherals.'' --- CompTIA ITF+ Hardware Troubleshooting
Correct answer: A
Which of the following is an example of a MAC address?
A MAC (Media Access Control) address is a hardware address assigned to a network interface card. It follows a 48-bit hexadecimal format usually displayed as six pairs separated by colons or hyphens:
''MAC addresses typically appear as 00:50:09:2D:4D:94.''
192.68.10.24 is an IPv4 address, fe80:102d:cd62:5434:82ae is an IPv6 address, and 0x3476 is simply a hexadecimal number, not a MAC address.
Which of the following is an advantage of using a flat file for a small amount of data?
A flat file is a simple database format often stored as a plain text or CSV file. It is ideal for small data sets where speed and simplicity are required.
''Flat files are simple and fast for storing small amounts of data and are easy to process without requiring a full database management system.'' --- CompTIA ITF+ Data Concepts
Correct answer: A
Which of the following does a diamond represent in a flowchart?
In flowcharts, a diamond represents a decision point --- a place where the program branches based on a yes/no or true/false condition.
''A diamond shape in a flowchart is used to depict a decision, indicating that the flow can take different paths based on a condition.'' --- CompTIA ITF+ Programming Concepts
Correct answer: B
Which of the following types of AI is used to edit images?
Generative AI is used to create new content including images, music, videos, or text. This includes tasks like image editing, enhancement, or generation using tools such as DALL*E, MidJourney, or generative adversarial networks (GANs).
''Generative AI creates new data or content, such as images, music, or text. It is commonly used in image editing, graphic design, and media production.'' --- CompTIA ITF+ Guide
Other AI types:
Assistive AI helps with tasks like navigation or text suggestions.
Predictive AI forecasts outcomes using existing data.
Chatbots simulate conversation, often in customer service.
