Module 1.2

Question 1

Input

Answer 1

• Provides inctructions to software
• Data that needs processing

Question 2

Types of image capture input

Answer 2

• Digital Camera
• Smartphone camera
• Top-end DSLR camera

Question 3

Digital Cameras

Answer 3

• DLSR: Cameras that have settings changeable lenses (Professional Camera)
• Point-and-shoot: Cameras that are designed fro quick use and do not have lenses or professional settings(Smartphone Camera)

Question 4

Advantages of Digital Cameras

Answer 4

• Can take multiple photos(limited to yor memory cards capacity)
• Photos can be viewed and deleted immediately
• Photo can be tranferred to another editing program easily because its already in digital format

Question 5

Disadvantages of digital cameras

Answer 5

There are no disadvantages, but they used to be:
* Low light
* Cost
* Quality

Question 6

Specifications that determine quality of digital cameras

Answer 6

• Resolution [dpi: dots per inch]: How many pixels make up the image (avg 10-30)
• Lense: The larger the lense, the better the quality
• Sensor: Larger sensors capture more light, even if a smaller one has the same amount of megapixels
• ISO: The sensitivity to light of the camera sensor. This is what determines the quality of low light photos
• Optical zoom: The closer you move towards the object, the clearer it gets (uses the cameras lense)
• Digital zoom: The closer you get, the blurrier and more pixelated it gets (the magnifying tool in editing software)

Question 7

Scanners

Answer 7

• An input device used to scan images to a computer

Question 8

Specifications that determine quality for scanners

Answer 8

• Resolution: The higher the dpi, the better the quality, but the image will aslo take up more space
• Colour depth: The amount of colours that can be represented by a pixel. Usually has 24bit colour. The higher the colour depth, the more space the image will take up.

Question 9

Advantages of scanners

Answer 9

• Many/large documents can be scanned and saved into one file
• Due to things being digital, they take up less office space
• No need for fax anymore
• Old documents can be shared with others ans stored for future generations
• Scanners like barcode and POS speed up work
• QR codes can direct people directly to websites instead of using an URL

Question 10

Disadvantages of Scanners

Answer 10

• Quality of scan is dependant on the original copy
• The scan can take long depending on what type it is

Question 11

Examples of data collection devices

Answer 11

• In hospitals to record heart rate, pressure, etc
• Used to record weather conditions
• Used by meters to record household water consumption

Question 12

Advantages of data collection devices

Answer 12

• Uses less man power
• Faster than human input
• Has less errors than human labour
• More accurate

Question 13

Disadvantages of data collection devices

Answer 13

• Could be an unnoticable error that will lead to incorrect infomation
• Could be expensive to install/upgrade/repair
• Not everything can be collected by sensors, so may need human intervention

Question 14

Output

Answer 14

• Provied user with feedback on what they were doing
• Give user with a more permanent copy of what was being processed
• Allow the transmission of data between computers/devices

Question 15

Display devices

Answer 15

• Show result of processing
• Allows user to make decisions by displaying options

Question 16

Advantages of display devices

Answer 16

• Allow interaction between the user and the computer
• Provides immediate feedback
• Displayed content is easily changed or updated
• Font size can be easily adjusted

Question 17

Disadvantages of display devices

Answer 17

• Not private
• Consumes the most amount of power
• Output is not permanent
• Difficult to share
• Most expensive part of computer to replace
• Can cause eye strain if very bright and headaches

Question 18

Types of output

Answer 18

• Sound
• Touch
• Visual
• Other(electrical transmissions)

Question 19

Specifications that determine quality for monitors

Answer 19

• Resolution: Number of pixels
• Response time: How quickly pixels change colour
• Aspect ratio: ratio between the length and width (16:10)
• Colour ratio: the amount of shades between the darkerst black and lightest white
• Lumens: How brigth the projected image is
• DVI and HDMI: Replaces VGA port because they provide quality due to their signlas being digital

Question 20

Drivers

Answer 20

• Allows your computer to communicate/connect to hardware and control it

Question 21

Plug-and-play

Answer 21

• When you plug something into your device it automatically and immediately gets ready to make use of that device

Question 22

Input/output for disabled people

Blind

Answer 22

• Braille keyboards
• Braille mouse
• Braille printer
• Large keyboard

Question 23

Input/output for disabled people

Deaf

Answer 23

• Flashing screens
• Vibrations
• On screen output