~How PC Parts Work~ (30 MARKS)

List 4 External components you can see on the PC in front of you and describe the basic function of each one. 1) DVD Drive – takes the information of the DVD and projects it onto the monitor. 2) Monitor – displays video and graphics which is generated from the computers graphics card. 3) Keyboard – a set of typewriter like keys that allow you to type what you want onto the screen. 4) USB Drive – takes the information from the USB, whether it’s photos, music, or other documents.

Inside of the case are internal components. List 6 components and describe the basic function of each one. 1) Power Supply - A power supply is an electronic device that supplies electric energy to an electrical load. 2) Motherboard - A motherboard is the main printed circuit board (PCB) found in general purpose microcomputers and other expandable systems. 3) RAM - RAM or Random Access Memory is a type of computer memory that can be accessed randomly. 4) Video Graphics Card - A video card connects to the motherboard of a computer system and generates output images to display. 5) ROM - Once data has been written onto a ROM chip, it cannot be removed and can only be read. ROM retains its contents even when the computer is turned off. 6) Hard Drive - A hard drive disk is a non-volatile memory hardware device that permanently stores and retrieves information.

List 7 Communication Parts. Describe the appearance and common uses of each one. 1) Keyboard – a keyboard looks like a smaller, more efficient typewriter. You can type what you want and it will appear on screen. 2) Mouse – a mouse is a little hand held device that allows you to click on what ever you want and it “guides” the computer. 3) DVD Drive – a DVD drive is a little slot in the computer where you’re able to put in a DVD and sync all the storage off that DVD onto the computer. 4) USB – a USB is a little stick of memory that you can stick into the computer to input data like, photos, music and other documents. 5) Power Supply – the power supply looks like a bunch of devices with a fan on the side of a case and it converts mains AC to low-voltage regulated DC power for the internal components of a computer. 6) Motherboard – a mother board hold together many of the crucial components of a computer, including the central processing unit (CPU), memory and connectors for input and output devices. 7) Video Card – video card looks like a rectangle with an opening at the top that looks like a fan and its used for generation output images to display. They’re also referred to as graphics cards.

Compare Primary and Secondary Storage. Primary storage typically refers to random access memory (RAM) Secondary storage refers to the computer's internal hard drive. A primary storage device is RAM.  A secondary storage device is

Explain what a byte, mega byte, and a gigabyte are. Byte – a byte is a unit of data that is eight binary digits long. Mega Byte – a multiple of the unit byte for digital information. Its recommended unit symbol is MB. Gigabyte – a measure of computer data storage capacity that is roughly equivalent to 1 billion bytes Byte - 8Bits= 1 byte(s) KB - Kilobyte = 1000 bytes MB - Megabyte= 1,000,000 bytes GB – Gigabyte= 1,000,000,000 bytes