Output devices

Question 1

What is the purpose of an Output Device?

Answer 1

To display the information.

Question 2

What is a pixel?

Answer 2

A pixel is a bit inside your screen is showing a bit of your display. The higher the number of pixels, the better.

Question 3

What is a Smart TV?

Answer 3

It is a Tv that can connect to the internet without streaming device or top box.

Question 4

What is meant by hard copy?

Answer 4

A copy that is printed out. It is not saved on the internet.

Question 5

Give one advantage and one disadvantage of Laser Printers:

Answer 5

Advantage:
High quality printouts - better than ink-jet or dot-matrix
Disadvantage:
Most expensive printer type to buy, especially colour lasers

Question 6

Give one advantage and one disadvantage of Ink-Jet Printers:

Answer 6

Advantage:
Cheap to buy - cheaper than a laser printer
Disadvantage:
Noisier than a laser printer (but not as noisy as a dot-matrix)

Question 7

What sort of task would require the use of a Plotter rather than a Laser or ink-jet printer?

Answer 7

Plotters are a specialist type of printer which is able to draw high quality images on very large pieces of paper, for example 3 foot wide by 10 foot long. The task is technical drawing.

Question 8

Give a reason why Touch Screens are commonly used in cashpoints.

Answer 8

Touch screens are easy to use and are often found in public places such as cashpoints at banks, ticket collection terminals at theatres or airports, information centers at museums.

Question 9

Why might a Digital Projector be used at Home?

Answer 9

• Home cinemas

Question 10

Why would external speakers be used even though the computer had an internal one?

Answer 10

Everyone in the classroom can hear.
Help create a atmosphere.

Question 11

When would Headphones be used even though the computer had an internal speaker?

Answer 11

It doesn’t annoy other people.
It can only be heard by one user.

Question 12

Give a common example of a use of computer controlled lights.

Answer 12

It gives light on day and changes to dark mode at night.

Question 13

Give FIVE reasons for these choices. Think about the differences in the ways the printers will be used. Give clear explanations. Make sure you use full sentences.

Answer 13

i. They use a laser printer as they have to print a lot and in high quality.

ii. At home, you do not print a lot of copies in very high quality.

iii. At school, they need to finish printing quickly

iv. It is very silent at school

v. At school, cartridge does not need to be replaced in a short period of time

Give an example of a task for which a plotter would be the best choice for an output device. Explain what makes a plotter so suitable.

Task:
To draw high quality pictures

Explanation:
Can be used by artists.

Question 14

List the examples of Internal Hardware included in the diagram on this page:

Answer 14

i. Hard disk
ii. C.P.U
iii. Fan
iv. Motherboard
iv. Sound Card
v. R.A.M

Question 15

What does the abbreviation CPU stand for?

Answer 15

Central processing unit.

Question 16

What is the disadvantage of using higher clock speeds?

Answer 16

It is hard to imagine just how fast this is, but it does mean that a CPU running at this clock speed can handle a huge amount of data in a very short time. This is why you can listen to music on the computer while you are also browsing the web and doing some work.

Question 17

How many cores does a Raspberry Pi 3 computer have

Answer 17

A modern processing device may contain two or even four CPUs. Some chip-making companies call these CPUs ‘cores’. So a dual-core device means it contains two CPUs and a quad-core contains four.

Question 18

What is meant by the term ‘non-volatile’?

Answer 18

The key thing to remember about ROM is that the data is not erased when the computer is switched off - the data is stored permanently. This type of memory is also called ‘non volatile memory’.

Question 19

Why is ROM needed in a computer?

Answer 19

This kind of memory is needed because the computer must be able to obtain instructions from the moment it is switched on and it must know some basic things about the hardware that makes up the machine i.e. ‘its configuration settings’.

Question 20

List two things that are stored in RAM

Answer 20

i) As well as storing the data you are working on, RAM also stores the modules that are needed to make your applications work.

ii) RAM is also needed so that you can have multiple windows open and so that you can switch between them.

Question 21

Why can installing extra RAM in a computer improve its performance?

Answer 21

It will help the computer to stop running slowly.

Question 22

What does the abbreviation RAID stand for?

Answer 22

Each hard disk has a copy of all the data, so if one fails the other can carry on. This is called a RAID array.

Question 23

Explain what Serial Access means.

Answer 23

Magnetic tape uses ‘serial access’ to find a piece of data. This means that to find a specific piece of data, the tape reader has to start at the beginning of the tape and continue fast forwarding until it gets to the piece of data that needed.

Question 24

Which type of Optical Storage Device has the greatest data capacity?

Answer 24

Blu-Ray

Question 25

Give two reasons why USB Memory Sticks are so popular.

Answer 25

i) Small and lightweight

ii) Contain a lot of data.

Question 26

Give the name of a type of Storage Device, other than a USB memory stick, has no moving parts.

Answer 26

SSD

Question 27

Give one advantage of having an NAS on a home network.

Answer 27

A NAS in the home can be used as a ‘media server’ where films and music are streamed over the network or even connected to the television by a WiFi link.

Question 28

Give two reasons why you might want to use Online Storage.

Answer 28

i)It is secure

ii)Provides back up data.