input and output devices

Question 1

input device

Answer 1

any hardware device used to send send data to a computer

Question 2

keyboard

Answer 2

an input device used to enter data , often characters into the computer system

Question 3

numeric keypad

Answer 3

a keyboard with a group of keys representing digits from 0 to 9 arranged in a rectangle

Question 4

advantages of using keyboards

Answer 4

1)They are common that everyone is familliar with them

2) They are easy to use and people quickly become familliar with their layout

Question 5

disadvantages of using keyboards

Answer 5

1) It is easy to make a mistake when entering data
2) Unless users learn how to type , it is very time-consuming to enter data
3)Cannot be used for creating diagrams and artwork
4)Different keyboard are required for different countries as they make use different characters

Question 6

mouse

Answer 6

Handheld pointing device used with a computer used to move the pointer/cursor on the screen. There are several different types of mice such as mechanical and optical mice.

Question 7

optical mouse

Answer 7

an optical mouse emits light and uses an optical sensor to detect changes in the reflected light to move a pointer on a computer screen.

Question 8

wireless mouse

Answer 8

a mouse that is not connected to the computer by a cable but communicates with it using radio waves

Question 9

advantages of using a mouse

Answer 9

1)It is a fast method of input
2) It is intuitive to use as it simply involves pointing at things

Question 10

disadvantages

Answer 10

1)Mice can be easily damaged or vandalised
2)Some people , particularly if they have physical disabilities , may find mice difficult to move
3)Overuse of a mouse can lead to repetitive strain injuries
4)mice need a flat surface to move on

Question 11

touchpad

Answer 11

a pointing device , often found on a laptop , that allows the user to use to their finger to move a point on the screen

Question 12

trackerball

Answer 12

a device to a move a pointer where a ball is pushed around directly by the user rather than being moved by the whole mouse being pushed

Question 13

remote control

Answer 13

a small hand-held device used to operate equipment such as TV or stereo

Question 14

joystick

Answer 14

a joystick can carry out the same tasks as a mouse as well as other functions such as controlling movement

Question 15

advantages of using trackerball

Answer 15

1)A trackerball is stationary and does not need a surface to be moved on
2)It can be built into a computer and is not likely to get damaged or lost like a mouse can
3)it can be used by disabled people who may not have the freedom of movement to use other pointing devices

Question 16

disadvantage of using trackerball

Answer 16

It can be difficult to use for some applications which need fine control.

Question 17

driving wheel

Answer 17

also called a racing wheel , used as an input device for racing games and simulations where the user controls vehicles

Question 18

touch screen

Answer 18

a display screen that is both an input and output device , that can respond to users interacting with a specific area.

Question 19

advantages of using a driving wheel

Answer 19

1) allows users to control movement far more accurately than a mouse or joystick
2) Force feedback can be added to provide simulated road resistance

Question 20

disadvantages of a driving wheel

Answer 20

1) Can only be used for one purpose , it can be difficult to use it for example writing a document .
2) Adding mechanical elements such as force feedback and fear levels increase manufacturing costs .

Question 21

resistive touch screen

Answer 21

a touch screen that is sensitive to pressure for your finger

Question 22

capacitive touch screen

Answer 22

a touch screen that is sensitive to static electricity from your finger

Question 23

scanner

Answer 23

a device that digitises text , diagrams and images

Question 24

hard-copy

Answer 24

a document printed on paper