1.3 Flashcards
(24 cards)
What is an input device
Any device that allows you to pass information from the outside world into the computer system
Examples of input devices
Keyboard, mic, barcode scanner, Webcam, mouse
What is an output device
A device that takes any data in digital form and converts it to a format humans can understand
Examples of output devices
Headphones, Television, speaker, projector, printer
What is a storage device
Any device used for temporary or permanent of data
Examples of storage devices
Floppy Disks, RAM, HDD, CD, USB, stick, SD card
Example of something that is an input and output device
Video-game controller
What is a drive in terms of secondary storage
Reads and writes data from secondary storage
What is “media” in terms of secondary storage
What the data is stored on
Types of optical storage devices
CD-R
CD-RW
DVD-R
DVD-RW
Blu-Ray
How to distribute music and how to distribute movies
CD-R
DVD-R
How do optical drives work
A laser is shone onto the disc and the reflection from the disc is processed. Pits and lands reflect differently forming binary
Optical media Positives and negatives
Positives
Cheap lightweight portable
Negatives
Slow access times prone to scratches
How does a HDD work
A driver head moves over the disc over different magnetically charged compounds which represent binary
Magnetic storage positives and negatives
Positives
Cheap, large capacity
Negatives
Slow access times, fragile
How do solid state drives work
Flow of electricity forces electrons into floating gates in between 2 oxide layers. Change in charge is measured as zero or a one
SSD Positives and negatives
Positives
Durable, fast access times
Negatives
Cost, limited read/write
Remember what storage is good in which situation
Okay G
What is ROM and its properties
Small piece of read-only memory on motherboard
Non-volatile
Contains bootstrap instructions
What is the bootstrap
Check hardware is installed correctly
Load BIOS
Software installed on ROM is called
Firmware
RAM and its properties
Temporary storage of instructions and data
Hold information being executed by processor
Fast to access
Volatile
Holds operating system
Bootstrap in detail
Has startup instructions placed onto it during manufacturing
