The CPU and memory are installed on which computer component?

The motherboard is the main circuit board of a computer that connects and supports all essential hardware components. It provides the platform on which the Central Processing Unit (CPU), memory (RAM), storage controllers, expansion slots, and other important components communicate with each other. Therefore, Option B (Motherboard) is the correct answer.

The CPU is installed in a dedicated processor socket on the motherboard, while the RAM modules are inserted into memory slots (DIMM slots) located nearby. The motherboard allows these components to exchange data efficiently through electrical pathways known as buses. It also distributes power to connected hardware and enables communication between internal and external devices.

The other options are incorrect because they perform different functions. An expansion board is an additional circuit board, such as a graphics card or sound card, that adds extra features to a computer but does not house the CPU or main memory. A storage device, such as a hard disk drive (HDD) or solid-state drive (SSD), is used for permanent data storage rather than processing. An output device, such as a monitor or printer, displays or produces information generated by the computer and is not responsible for holding internal hardware components.

Key Point:

• Motherboard: Main circuit board that holds the CPU, RAM, and other essential components.


• CPU: Processes instructions and performs calculations.


• RAM: Temporarily stores data and instructions during processing.


• Expansion Board: Adds extra functionality, such as graphics or sound.


• Storage Device: Permanently stores data and programs.

Exam Tip:

               Remember that the motherboard is the backbone of a computer because it connects the CPU, RAM, storage devices, and other hardware components into a single working system.