Chapter 5 - Output Devices (1.1)

Question 1

What is an output device?

Answer 1

Sends information from a computer

Question 2

State some examples of output devices. (5)

Answer 2

1. Screens
2. Printers
3. Multimedia Projectors
4. Speakers
5. Actuators

Question 3

What is an LCD monitor?

Answer 3

Contains groups of red, blue, and green diodes to form each pixel, usually back lit by LEDs

Question 4

What are some advantages of LCD monitors? (6)

Answer 4

1. reach maximum brightness almost immediately
2. sharp images with realistic and vivid colours
3. better picture definition as they produce a brighter light
4. thinner screens in construction as LEDs are small
5. reliable as they last indefinitely
6. consume very little power, produce very little heat and reduce running costs

Question 5

What is a disadvantage of LCD monitors? (1)

Answer 5

Can be slow to refresh

Question 6

What are some advantages of OLED screens? (5)

Answer 6

1. flexible as made of plastic instead of glass
2. way thinner than LCD
3. way brighter than LCD and don’t need backlighting, so they consume less power which translates into longer battery life
4. OLEDs respond 200 times faster than LCDs
5. Produce truer colours through a bigger viewing angle, LCD has colours darken and disappear if you look from the side

Question 7

What are some disadvantages of OLED screens? (2)

Answer 7

1. They don’t last as long
2. Not waterproof

Question 8

What do laser printers use?

Answer 8

Toner

Question 9

What are some advantages of laser printers? (2)

Answer 9

1. high quality and high speed painting
2. increasingly affordable

Question 10

What is a disadvantage of laser printers? (1)

Answer 10

photorealistic prints are impossible

Question 11

How do inkjet printers work?

Answer 11

They spray dots of ink onto paper to create an image

Question 12

What are some advantages of inkjet printers? (2)

Answer 12

1. produce excellent, photo-realistic images
2. cheaper than laser printers

Question 13

What are some disadvantages of inkjet printers? (2)

Answer 13

1. Slow to use
2. Ink cartridges have to be replaced frequently

Question 14

How does a dot matrix (impact) printer work?

Answer 14

The print head has a matrix of pins which strike the surface of the paper to form letters

Question 15

What are some advantages of dot matrix (impact) printers? (2)

Answer 15

1. Useful when multi-part stationary is needed
2. Can operate in damp and dirty environments

Question 16

What are some disadvantages of dot matrix (impact) printers? (3)

Answer 16

1. Noisy
2. Slow
3. Print quality is poor

Question 17

What are some advantages of 3D printers? (2)

Answer 17

1. Can create a range of products and can be used for general use
2. eco-friendly as it doesn’t have as much waste

Question 18

What are some disadvantages of 3D printers? (2)

Answer 18

1. Expensive
2. Mistakes can be made which wastes money

Question 19

What are some advantages of multimedia projectors? (4)

Answer 19

1. Aids concentration as there’s an image to look at
2. Adds interest to the lesson as you can watch videos
3. Efficient and consistent in quality
4. Adds impact to lessons

Question 20

What is a speaker?

Answer 20

Outputs sound from a device

Question 21

Give examples of where speakers can be used. (4)

Answer 21

1. Playing music and video soundtracks
2. Verbal instructions in a sat-nav
3. Reading text from the screen
4. Giving notifications to users

Question 22

What is an actuator?

Answer 22

motors commonly used in conjunction with sensors to control a mechanism

Question 23

Give examples of what actuators can do. (4)

Answer 23

1. open a window or valve
2. starting or stopping a pump
3. turning a wheel
4. controlling devices in a smart home