What term describes a computer designed to perform a single fixed function and is often used in devices?

• A. Embedded system
• B. Personal computer
• C. Server
• D. Mainframe

Answer: (A)

The idea being tested is that some devices include a computer that is built specifically to do one fixed job within a larger system. This kind of computer is called an embedded system. It’s designed to perform a single function, often with tight real-time requirements, and is usually integrated into a device like a microwave, thermostat, or car controller. Because its software and hardware are tailored for that particular task, it isn’t meant to run a wide range of programs like a general-purpose computer would.

Other options describe broader, more flexible computing roles. A personal computer is built to run many kinds of software for various tasks, not just one fixed function. A server provides services to other computers, typically handling multiple tasks or users. A mainframe is a large, powerful computer used for extensive processing across many users. None of these match the idea of a single-purpose computer embedded inside devices.