What component acts as the brain of the computer, processing instructions and data?

The CPU, or Central Processing Unit, is often referred to as the brain of the computer due to its critical role in processing instructions and data. It executes commands from programs and handles calculations, data processing, and logic operations. The CPU interprets and processes the instructions it receives from both the software and hardware components of a computer system.

This processing capability allows it to coordinate activities across different parts of the computer, working in conjunction with other components such as memory and storage. The CPU's performance is a major determining factor in the overall speed and efficiency of a computer. It manages tasks such as running applications, performing calculations, and retrieving data, making it essential for the computer's operations.

Other components mentioned, such as databases, input devices, and graphics cards, serve different purposes. Databases are used for storing and managing data, input devices allow users to interact with the computer (like keyboards and mice), and graphics cards are specialized hardware meant for rendering images and video. While all these components are crucial for a computer's functionality, none perform the central processing tasks handled by the CPU.