The correct answer is D. Program.
A general-purpose computer is a computer that can be programmed to carry out a wide range of tasks. This is in contrast to a special-purpose computer, which is designed to perform a specific task.
The program is the set of instructions that tells the computer what to do. It is stored in the computer’s memory and is executed by the processor. The program can be changed to change the computer’s function.
For example, a general-purpose computer can be used to write a document, play a game, or create a website. A special-purpose computer, on the other hand, might be used to control a machine tool or to monitor a patient’s vital signs.
The other options are incorrect because they are not the only things that can be changed to change a computer’s function.
- Output device: The output device is the part of the computer that displays the results of the program. It can be a monitor, printer, or speaker.
- Input device: The input device is the part of the computer that allows the user to enter data into the computer. It can be a keyboard, mouse, or scanner.
- Processor: The processor is the part of the computer that executes the program. It is the most important part of the computer and determines its speed.