4. Which component is part of the system unit?
Answer: D
Expansion slot is part of the system unit.
The expansion slot is a component within the system unit that allows for the addition of expansion cards, enhancing the computer's capabilities.
A) Keyboard
The keyboard is an input device used to enter data into a computer, but it is not part of the system unit itself. Instead, it is an external peripheral that connects to the system unit.
B) Monitor
The monitor is an output device that displays visual information from the computer. Similar to the keyboard, it is an external component and not part of the system unit.
C) Printer
A printer is also an external output device used for producing physical copies of documents. It does not reside within the system unit and therefore is not considered a component of it.
D) Expansion slot
The expansion slot is located on the motherboard within the system unit, making it a critical component. It allows users to install additional hardware, such as graphics cards or sound cards, to enhance the computer's performance.
Conclusion
The expansion slot is definitively part of the system unit as it is integrated into the motherboard, allowing for hardware expansion. In contrast, the keyboard, monitor, and printer are all external peripherals that do not form part of the internal structure of the system unit. This distinction is essential in understanding the components that comprise a computer's system unit.