Summary
Summary Computer Applications Technology theory
- Institution
- Crawford Schools
Compilation of past papers. My mark went from C to A using these notes that I made. Essential key points summarised.
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By: khanyasangqu05 • 4 year ago
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Keys and symbolsO: Advantages
X: Disadvantages
⇒: so, as a result of, therefore, then
CJ: Crawford June 2019
CP: Crawford Prelim 2019
MC: Multiple choice
MTC: Match The Column
TF: True or False
AC: Acronym asked
LAQ: Long Answer Question (±3 marks)
SAQ: Short Answer Question (±1 mark)
,HDMI carries digital video and audio simultaneously over the same cable
CP LAQ HDMI over VGA, why?
• HDMI carries both video and audio
• HDMI = digital signal => better image quality
• HDMI can be connected directly to TV / data projectors
Biometric input
The scanning of unique biological or physical features for security, identification and
authorisation purposes
Ergonomic equipment
• So as not to have a negative impact on your health
• Reduce the likelihood of RSI and CTS
e.g. keys positioned so that the hands are held in a more natural position / soft-touch
keys / wrist or palm rests
Voice Recognition Software e.g. SIRI, a virtual assistant software
Speaks to your computer / device ⇒ It understands and responds to what you said
➔ For people who have
• Poor motor control
• Visual impairment
CP MC OCR = Optical Character Recognition
To get an editable version of a scanned document
,Data projector
O
- bigger size of display / better for larger venues
- portable => easy to set up
X
- resolution of images produced by the projectors are not as good as those of high
quality monitors
- they have lower contrast ratios
- images produced are not as bright
- aspect ratio normally 4:3
CP LAQ E-learning software – learn things online
O
- can collaborate with others online
- can work at your own pace
- immediate feedback
X
- some students might not know how to use e-learning software
- lack of human contact
Dot-matrix printer = A type of printer that can create ‘carbon copies’
,Multi-function printer
O
- performs various tasks
- saves space
- uses only one USB port
CP LAQ Laser printer vs Inkjet printer
Laser printers have lower running costs and they print at faster speed than inkjet
printers
3D printers
X
- Expensive
- Takes long time to print
CP MC To make more USB ports
⇒ add a USB hub (hardware) to the computer
Green computing = using computers in a way that is not harmful to the environment
CP LAQ For green computing
1. Recycle the cartridges
2. Use a lower resolution to print
, 3. Switch off the printer when not in use
Computer’s contribution to green computing
1. Assist in saving paper and paper costs in a paperless office environment
2. Save electricity in an energy efficient building e.g. timers or sensors for lights
CMYK = Cyan Magenta Yellow blacK
Term associated with the ability of printers; ink cartridges
PPI = Pixels Per Inch
Resolution of images
High resolution photo
X - larger in file size
O - better quality
Mouse not working?
1. Disconnect and reconnect the mouse
2. Reboot the computer
3. Plug it into a different USB port
4. Reinstall drivers
Set up and use a new account, and not the “default” administrator account
→ Secure access to data
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