1.1.3 Input, output and storage

Question 1

1.1.3 A
what is an input device and
what is an output device
what is an storage device
with examples

Answer 1

input device is any device that allows you to pass information from the real world into the computer ex: mouse, webcam

output device is any device that takes data stored in digital form and converts it into other formats that humans can process ex : sound, vibrations

storage device is any device used for temporary or permanent stooge of data either external or internal
Ex: ram , sdd , usb stick

Question 2

Types of secondary storage

Answer 2

magnetic, flash and optical storage
devices.
drives are the device that r/w data secondary storage
media what the data is stored on

Question 3

The uses of magnetic storage
devices
pos/neg

Answer 3

harddrives
ferrous partials on disk are polarised to become either south or north state representing 0’s and 1’s
pos ) cheap, large capacity
neg ) slow access time , fragile

Question 4

The uses of flash storage
devices
pos/neg

Answer 4

solid state drives , memory cards , memory stick
flow of electricity pushes through electrons into floating gate between two oxide layers, change in charge is 0 or 1
pos ) durable , portable (memory card) , fast access time
neg ) cost , limited r/w (oxide layers deteriate transfer of electrons becomes unreliable)

Question 5

The uses of optical storage
devices
pos/neg

Answer 5

cd r/w , dvd r/w , blue ray
has pits and land representing 0’s and 1’s reflective and non reflective are read as 1’s and 0’s
rewriteable need laser and magnet to change
pos ) cheap, lightweight, portable
neg ) slow access time, scratches

Question 6

What is a processor

Answer 6

special components that processes data and instructions to control other components with a computer. Example cpu and gpu

Question 7

define primary storage

Answer 7

memory witch computer can store data or instructions that are currently being used

Question 8

define secondary storage

Answer 8

memory witch computer can store data or instructions that are not currently being used

Question 9

define embedded systems

Answer 9

a computer system built into another device to support its operations

Question 10

define general purpose systems

Answer 10

capable of preforming many different tasks