1.1.3 input,output and storage system

Question 1

sensors

Answer 1

hardware device that take measurement of physical properties

Question 2

scanners

Answer 2

-qr code
-barcode (UPC-A, code 128)

Question 3

actuators

Answer 3

motors

Question 4

thermometer

Answer 4

it is both input and output
use heat sensor instead

Question 5

criterias to compare with secondary storage

Answer 5

durability
portability
reliability
capacity
cost (per GB)
speed (r/w)

Question 6

RAM

Answer 6

• stores program and data currently in use
• faster read and write speed than secondary storage
• volatile

Question 7

ROM

Answer 7

• stores programs that needs to be boot up (e.g. BIOS, bootstrap loader)
• contents are non-volatile and cannot be altered/overwritten

Question 9

virtual memory

Answer 9

when RAM is full and inactive data is swapped to secondary storage

a feature of os

Question 10

virtual storage

Answer 10

aka cloud storage

storing and retrieving data over the internet in the cloud instead of a local storage device

OR

abstraction or separation of logical storage from physical storage