JUNE 2019, FORM 1 COMPUTER STUDIES MIND BLOWING QUESTIONS AND ANSWERS

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JUNE 2019, FORM 1 COMPUTER STUDIES MIND BLOWING QUESTIONS AND ANSWERS

​1. Write the following acronyms in full

• OBR - 
  Optical Barcode Reader
• OCR - 
  Optical Character Recognition
• OMR - 
  Optical Mark Recognition
• MICR - 
  Magnetic Ink Character Recognition
• MRI -
  Magnetic Resonance Imaging

​2. State advantages of the keyboard over a mouse

1. Keyboard can input text data, a mouse cannot.
2. A keyboard can operate a computer without a mouse but a mouse cannot fully operate the computer without a keyboard.
3. A keyboard can work on a multiple operating system such as command line interface, while a mouse only works on graphical user interface and menu driven interface.
4. A keyboard has more operating and input features as compared to a mouse these features include function keys, special PC operation keys, data movement and editing keys and alphanumeric and numeric keypad keys. These features almost does everything to accomplish a task with a computer. While a mouse can only input instructions/commands.

3. Which input devices is recommended for use by blind people.

1. Braille keyboard
2. Voice input
3. Smart gloves (turning sign language to text)

​4. Distinguish between magnetic and optical scanners

​Magnetic scanners capture data using magnetic technology, while optical scanners capture data using a directed beam of light.

5. State two advantages of using a light pen over other input devices

1. With a light pen, digital signatures are possible.
2. It is easier to make drawings with light pen than other input devices.

​6. State 3 factors to consider when purchasing/selecting input devices.

1. ​What the device is intended for
   what are you intending to use this device for?
   
2. Bulkiness of the device / portability / stationery
   this is how big or small the machine is and if it can be carried from one place to another for use or not
   
3. Amount of work to be handled
   bulky work needs faster machines
   
4. Type of input data
   it can be text, voice, instruction, sign language etc.
   
5. Initial Cost 
   the cost of buying the input device
6. Maintenance cost
   this is the cost at which the buyer incur after the machine malfunction
   
7. Warranty / documentation
   agreement between the buyer and seller on terms of after sale service and prove of purchase
   
8. User-friendliness
   the interaction with users should be easy and friendly
   
9. User ability / disability
   there are users with disability such as blind,crippled or dumb
10. Quality of input device
    e.g. water proof, coating materials that can guarantee durability, power consumption etc.
11. The speed at which the input device captures data
    this is the frequency at which it captures over a given duration of time. Input devices such as scanners are faster than keyboard and more accurate.
12. Hardware / software compatibility
    ability for its software to work with other available software packages
    
13. Upgradability
    capability of being improved in functionality by the addition or replacement of components or software.
    
14. Interface / connectivity
    The type of interface used for connectivity should be available for your computer hardware. In most cases, USB and HDMI interface is used.
    
15. Versatility
    This is the ability of a machine to adapt to other functions other than input data. The functions may include printing and photocopying.
    

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