HAS 100 Fundamentals of Healthcare Administration Practice Exam

The main idea is that the central processing unit is the brain of a computer. The CPU is responsible for running the instruction cycle: it fetches instructions from memory, decodes what they require, and then executes them. Within the CPU, the arithmetic logic unit handles calculations and logical operations, while the control unit directs the movement of data between the CPU, memory, and other components.

RAM stores data and instructions for quick access during processing but does not itself execute instructions. A CD-ROM is a storage medium that holds data and programs but isn’t capable of running them. The monitor is an output device that displays results but does not perform computations. So, the CPU is the component that actually executes program instructions and performs calculations.