Which computer component is responsible for executing instructions?

• A. RAM
• B. I/O devices
• C. CPU
• D. Storage

Answer: (C)

The CPU is responsible for executing instructions. It fetches an instruction from memory, decodes what needs to be done, and then carries it out, performing calculations, making decisions, and directing data to move where it’s needed. The CPU can do this thanks to its parts: the control unit, which coordinates operations; the arithmetic logic unit, which performs calculations and logical decisions; and the registers, which hold data temporarily while instructions are being executed. RAM stores data and programs while the computer is running but doesn’t execute instructions on its own. I/O devices handle input and output, like keyboards and screens, and storage provides long‑term retention of data and programs. So the component that actually runs the instructions is the CPU.