Which statement best describes embedded systems?

• A. They are generic computers capable of handling diverse tasks.
• B. They are typically robot controllers for industrial automation.
• C. They are standalone computers with their own OS.
• D. They are computers built into another device to perform a dedicated function.

Answer: (D)

Embedded systems are specialized computers that reside inside another device to control or monitor its function. They’re designed for a specific task or small set of tasks, often with limited memory, processing power, and sometimes no full operating system at all. This tight integration with the host device and focus on a dedicated function is what makes them distinct from general-purpose computers.

The statement describing them as computers built into another device to perform a dedicated function directly captures this idea: the system is embedded, purpose-built, and tightly coupled to the device it controls. Other choices imply broad versatility or standalone operation with a full OS, which doesn’t align with how embedded systems are typically designed and used.