Which CPU function interfaces the computer with peripheral devices?

Which CPU function interfaces the computer with peripheral devices?

• A. Memory
• B. Arithmetic Logic Unit
• C. Input/Output
• D. Control Unit

Answer: (C)

The important concept is how a computer connects with devices outside the CPU. The Input/Output subsystem is responsible for moving data between the computer and peripheral devices like keyboards, printers, disks, and network cards. It handles data transfers, signaling, buffering, and timing so devices can send data to the CPU or receive data from it. The CPU uses the control unit to orchestrate operations, including I/O, but the actual interface to peripherals—the path that carries data to and from devices—is provided by the Input/Output system. For example, keystrokes or a print job travel through this path, whereas memory is where data is stored and the Arithmetic Logic Unit performs calculations.

The important concept is how a computer connects with devices outside the CPU. The Input/Output subsystem is responsible for moving data between the computer and peripheral devices like keyboards, printers, disks, and network cards. It handles data transfers, signaling, buffering, and timing so devices can send data to the CPU or receive data from it. The CPU uses the control unit to orchestrate operations, including I/O, but the actual interface to peripherals—the path that carries data to and from devices—is provided by the Input/Output system. For example, keystrokes or a print job travel through this path, whereas memory is where data is stored and the Arithmetic Logic Unit performs calculations.