input, output, storage

Question 1

RAM

Answer 1

random access memory

short term memory to quickly access data currently in use

volatile

Question 2

ROM

Answer 2

read only memory
permanent store of data
stores the bootstrap

Question 3

what is an input device?

Answer 3

hardware that puts data and information into a computer

Question 4

examples of input devices

Answer 4

keyboard, webcam, barcode reader

Question 5

what is an output device?

Answer 5

hardware that sends information from the computer

Question 6

output device examples

Answer 6

speakers, headphones, printer

Question 7

what is optical storage?

Answer 7

read and written to using lasers
binary information is represented on the disc as pits (0) that scatter light or lands (1) that reflect

Question 8

examples of optical storage

Answer 8

CD
-small quantities of info, used for audio files, portable
-easily damaged, limited capacity
DVD
-higher storage capacity
Blue-Ray
-have 5x amount of storage as DVD

Question 9

what is magnetic storage?

Answer 9

stores information magnetically represent binary info using 2 magnetic states: polarised and unpolarised

Question 10

magnetic storage examples

Answer 10

hard disk drive
-high capacities
-slow data transfer speeds
-delicate

Question 11

what is flash storage?

Answer 11

fast and compact storage using semiconductors to be reprogrammed electronically, its volatile

Question 12

flash storage example

Answer 12

solid state drive
-light and portable
-high cost

Question 13

what is virtual storage?

Answer 13

storing information remotely so it can be accessed anywhere at anytime

Question 14

examples of virtual storage

Answer 14

the cloud storage services like google drive, Microsoft one drive.

Question 15

what is open source software?

Answer 15

code that can be used by anyone without a license

distributed with the source code

Question 16

advantages of open source

Answer 16

modified or improved by anyone
technical support from an online community

Question 17

disadvantages of open source

Answer 17

lack of support-no user manuals
low security

Question 18

what is closed source

Answer 18

code requires the user to hold an appropriate license to access it
company owns the copyright license

Question 19

advantages to closed source

Answer 19

-regular thorough updates
-expert support and user manuals as the company owns it
-high security

Question 20

what is compression?

Answer 20

process used to reduce the storage space required by a file to store more files

makes it quicker to send files across networks or the internet

Question 21

what is lossy compression?

Answer 21

-reduces the size of a file and removes some of its information
-results in a lower quality file eg a pixilated image or less clear audio
-the original file cannot be recovered

Question 22

what is lossless compression?

Answer 22

-reduces the size of a file without losing any information
-the original file can be recovered after compressing