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ANALYSIS OF KCSE COMPUTER STUDIES TOPICAL QUESTIONS & REVISION KITS

This site is a creation of all possible KCSE computer studies questions and answers
Picture

State three features of fifth generation computers.

14/1/2021

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State three features of fifth generation computers.

Features of fifth generation computers
  •  Use of expert system .
  •  Support the use of natural language
  •  Support distributed computing
  •  Support artificial intelligence and voice recognition.
  •  Support parallel processing
  •  Small in size? portable
  •  Superior hardware and software
  •  consume less power
State three features of fifth generation computers.

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Headache, back and neck pain may result from the use of computers.

12/1/2021

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Headache, back and neck pain may result from the use of computers.

State how each of them can be minimised. 
Headache
  •  Use of filters/antiglare.
  •  Proper lighting.
  •  Regular break.
Back & Neck Pain
  •  Proper/correct furniture for the computer.
  •  Correct position of the screen.
  •  Correct sitting posture.
  •  Taking a break.
Headache, back and neck pain may result from the use of computers.

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​State the hardware technological differences between the second generation and the third generation computers

11/1/2021

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​State the hardware technological differences between the second generation and the third generation computers. (2 marks)

Second Generation Computers

  1. Low memory
  2. Less powerful processing speed
  3. Used transistors to process

Third generation computers

  1. Larger memory
  2. More powerful processing speed
  3. Used integrated circuits to process
honeywell 200
the honeywell 200 was an example of 2nd generation computer

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​State two ways of ensuring proper ventilation in a computer room

11/1/2021

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​State two ways of ensuring proper ventilation in a computer room. (2 marks)

  1. Opening windows while the computer laboratory is in use
  2. Avoid overcrowding of learners and computers
  3. Sufficient installation points should be installed in the room
  4. The room should have large & enough windows & doors
  5. Installing an air-conditioning system.
  6. Installing cooling fans.
​State two ways of ensuring proper ventilation in a computer room

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State two advantages of using portable computers.

7/1/2021

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State two advantages of using portable computers.

Advantages of portable computers
  •  They have battery that powers the devices hence can be used when where is no power.
  •  They can be used anywhere because they are light.
  •  They require less space.
  •  Technology must be qualifìed. 
State two advantages of using portable computers.

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State two circumstances under which warm booting of a computer may be necessary.

7/1/2021

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State two circumstances under which warm booting of a computer may be necessary.

Reasons for warm booting a computer
  •  when computer hangs
  •  when a program encounters an error
  •  during the installation of new software for the installation to be complete
  •  during the installation of hardware so that the drivers can be activated.
State two circumstances under which warm booting of a computer may be necessary.

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​Differentiate between analogue data and digital data as used in computers.

7/1/2021

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​Differentiate between analogue data and digital data as used in computers. (2 marks)

  • Analogue data Uses values that change continuously between to instances while Digital data are values that change from one value to the next in a step by step sequence.
​Differentiate between analogue data and digital data as used in computers.

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​State three functions of Un-uninterruptible Power Supply (UPS)

7/1/2021

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​State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)

Picture

​​Functions of the UPS

  1. It regulates power from an unstable power source to the required clean stable voltage.
  2. It prevents power surges and brownouts that might destroy the computer.
  3. It temporarily provides power to the computer in case of the main power failure.  This allows the user to save his/her work and shutdown the computer using the correct procedure.
  4. Alerts the user of any power loss (by beeping).

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Explain two health issues that could arise from the use of an unsuitable computer desk.

6/1/2021

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Explain two health issues that could arise from the use of an unsuitable computer desk.

  1. Problems arising from use of unsuitable computer desk.
  2. It could lead to back problems if the desk is of an unrealistic height.
  3.  If it does not provide good positioning of the monitor, it could result in eye strain.
  4.  Wrist problems will arise if the keyboard and mouse seating positions are bad.
  5.  Injury as a result of falling computer components due to weak computer desks/ small size.
Explain two health issues that could arise from the use of an unsuitable computer desk.

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State two reasons for the increased use of laptop computers in government offices

4/1/2021

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​State two reasons for the increased use of laptop computers in government offices. (2 marks)

​Reasons for the preference for laptops.
  1. They are small and fit in a small storage space.
  2. They are light weight hence can be carried to areas where their services are required.
  3. The monitor, system unit, keyboard units are attached together hence making its use to be convenient.
  4. Rechargeable / backup battery.
​Reasons for the preference for laptops

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State four characteristics which make computers better than human beings.

3/1/2021

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State four characteristics which make computers better than human beings.

  1.  Computers  can be automated or programmed.
  2.  Computers are fast.
  3.  Computers are capable of performing repetitive tasks.
  4.  Computers can store a lot of information.
  5.  Computers are accurate.
  6. Can do dangerous tasks.
  7.  Give quality output.
  8.  Diligence /don’t get tired/sick.
State four characteristics which make computers better than human beings.

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State two reasons why it is necessary to use standard furniture in a computer laboratory.

3/1/2021

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State two reasons why it is necessary to use standard furniture in a computer laboratory.

  •  Prevents people from straining. .
  •  Table sizes allow all equipment to fit.
  •  Optimization/utilization of room space.
State two reasons why it is necessary to use standard furniture in a computer laboratory.

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A computer teacher put a rule that diskettes should not be used in the computer laboratory

1/1/2021

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​A computer teacher put a rule that diskettes should not be used in the computer laboratory 

(a) Give a reason for the rule
  • Introduction of viruses and other bugs from the diskettes
(b) State two other alternatives that can be used to achieve the same objective
  • By disabling the diskette drive
  • Having up to date antivirus software that will defect and eradicate any virus in the diskette.
computer laboratory
The computer laboratory

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Name four toggle keys on a standard computer keyboard

31/12/2020

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Name four toggle keys on a standard computer keyboard

  • Toggle keys 
  •  Caps Lock .
  •  Num Lock
  •  Insert key/OVR
  •  Scroll Lock 
Name four toggle keys on a standard computer keyboard

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Threats to the safety of computer systems take many forms such as: White- collar crime, natural, disasters, vandalism and carelessness.

31/12/2020

0 Comments

 

Threats to the safety of computer systems take many forms such as: White- collar crime, natural, disasters, vandalism and carelessness.

​Give one way as to how each of these forms  of threats  can be controlled

the computer laboratory
  • White Collar Crime
    Enforce personnel  security e.g.
    • No one person should be wholly responsible as system administer
    • Introduce computer audit trails
    • No one person should be in one department for a long time. Purge employees
  • Natural Disasters
    • Floods, computers rooms  should not  be installed in basements
    • Lightening, Use  UPS, surge  protectors and the  like (have backups that are well kept safely away from the computers site, have a contingency plan).
  • Vandalism
    • Enforce personnel security e.g. restrict building access
    • Secure computer  systems to desks, reinforce doors, windows
    • Introduce alarm system, CCTV systems
  • Carelessness
    • Avoid food, drinks into the lab
    • Have backups incase of unintended delete operations
    • Have undelete utilities

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