What is the CPU primarily responsible for?

• A. Rendering graphics
• B. Handling network traffic
• C. Storing data permanently
• D. Processing instructions and controlling data flow

Answer: (D)

The CPU is the command center that executes instructions and coordinates data movement in the system. It fetches instructions from memory, decodes what needs to be done, performs calculations or logical operations in the arithmetic-logic unit, and then writes results back or passes data to other components. The control unit directs the timing and sequence of these steps, ensuring data flows to the right places at the right times.

Graphics rendering is handled mainly by the GPU, which is optimized for drawing images in parallel. Network traffic is managed by the network interface and the operating system’s networking stack. Permanent data storage is provided by storage devices like SSDs or HDDs and their controllers. So, the CPU’s main job is to process instructions and control data flow throughout the computer.