Computer studies analysis of questions and answers

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

15/1/2021

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State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

Taking regular break intervals when using a computer.
Use an ergonomic keyboard to avoid stress.
Support wrist with wrist rest pad when using a mouse.
Use of standard furniture/proper sitting posture.

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A computer technician has observed a lot of dust on computers in the computer laboratory.

14/1/2021

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A computer technician has observed a lot of dust on computers in the computer laboratory.

State three precautions that need to be put in place to avoid this.

Fit ventilating I air conditioning system to allow free circulation of air.
Fit curtains on the windows / add a curtain net to reduce dust entry into the laboratory.
Regularly use of a blower or vacuum cleaner/mob to blow dust from the computer parts.
Avoid entering the laboratory with materials that may have dust such as shoes.

A computer technician has observed a lot of dust on computers in the computer laboratory.

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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 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)

Opening windows while the computer laboratory is in use
Avoid overcrowding of learners and computers
Sufficient installation points should be installed in the room
The room should have large & enough windows & doors
Installing an air-conditioning system.
Installing cooling fans.

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State three possible causes of fire outbreak in a computer laboratory.

8/1/2021

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State three possible causes of fire outbreak in a computer laboratory.

Sources of fire in a computer laboratory

Electrical faults;
Natural causes e.g lightening;
External attacks e.g arsonists/terrorists;
Inflammable material;
Accidents.

State three possible causes of fire outbreak in a computer laboratory.

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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.

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

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State three risks posed by improper cabling in a computer laboratory.

6/1/2021

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State three risks posed by improper cabling in a computer laboratory.

Risk of electric shocks to the users.
Risk of tire outbreaks in the laboratory.
Risk of tripping and injuries.
Power interruption caused by stumbling on the cables.

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State three measures that should be put in place in a computer laboratory to safeguard Users’ health.

4/1/2021

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State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

Measures to be put in place in the laboratory to safeguard user health.

All power cables must be insulated and hidden from users.
The furniture used must be of standard computer furniture.
The room should be lit with adequate lighting.
The room must be ventilated.
Computer monitor should be fitted with anti-glare to filter excess light rays emanating from the monitor.
Avoid slippery floors/cemented floors.
Controlling dust.

Anti-glare-filter-protection-screen-computer

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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.

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Explain why the following controls should be implemented for computer based systems

3/1/2021

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(a) Explain why the following controls should be implemented for computer based systems (2mks)

Backups
To maintain a copy of original data in case the original one is lost or corrupted.
Passwords
To prevent unauthorized users from trying to access private data

(b) For each of the following give one reason why they are not allowed in a computer laboratory.

Smoking
Can start fire
Can introduce dust through smoke particles
Eating foods
Can spill and spoil computer parts like keyboard

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State two health issues that may result from prolonged use of computers

2/1/2021

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State two health issues that may result from prolonged use of computers

Exposure to electromagnetic radiation through the VDU
Eye Strain
Repetitive strain injury causing muscle fatigue etc

State two health issues that may result from prolonged use of computers

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Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

1/1/2021

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(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

Using a glare filter
Using an LCD screen (does not emit radiation)
Not sitting in front of the computer for long hours

(b) List three factors be considered when deciding on the choice of an electronic data processing method

Suitability of accumulating data (Transmission) into batches for processing
Need for direct information retrieval and / or file interrogations
Optimization of the processing time
Time factor of the information for decision making by the managers
Cost of acquiring the necessary h/w, s/w media etc

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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.

The computer laboratory

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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

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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

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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Headache, back and neck pain may result from use of computers. State how each of them can be minimised.

31/12/2020

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Headache, back and neck pain may result from 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.

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ANALYSIS OF KCSE COMPUTER STUDIES TOPICAL QUESTIONS & REVISION KITS

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

A computer technician has observed a lot of dust on computers in the computer laboratory.

A computer technician has observed a lot of dust on computers in the computer laboratory.

State three precautions that need to be put in place to avoid this.

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

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

State two ways of ensuring proper ventilation in a computer room

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

State three possible causes of fire outbreak in a computer laboratory.

State three possible causes of fire outbreak in a computer laboratory.

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

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

State three risks posed by improper cabling in a computer laboratory.

State three risks posed by improper cabling in a computer laboratory.

State three measures that should be put in place in a computer laboratory to safeguard Users’ health.

State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

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

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

Explain why the following controls should be implemented for computer based systems

(a) Explain why the following controls should be implemented for computer based systems (2mks)

(b) For each of the following give one reason why they are not allowed in a computer laboratory.

State two health issues that may result from prolonged use of computers

State two health issues that may result from prolonged use of computers

Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

(b) List three factors be considered when deciding on the choice of an electronic data processing method

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

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

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

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

Headache, back and neck pain may result from use of computers. State how each of them can be minimised.

Headache, back and neck pain may result from use of computers. State how each of them can be minimised.

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ANALYSIS OF KCSE COMPUTER STUDIES TOPICAL QUESTIONS & REVISION KITS

State two ways through which a computer user can minimise Repetitive Strain Injuries (RSI) associated with the use of a computer.

A computer technician has observed a lot of dust on computers in the computer laboratory.

State three precautions that need to be put in place to avoid this.

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

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

State three possible causes of fire outbreak in a computer laboratory.

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

State three risks posed by improper cabling in a computer laboratory.

​​State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

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

(a) Explain why the following controls should be implemented for computer based systems (2mks)

​(b) For each of the following give one reason why they are not allowed in a computer laboratory.

State two health issues that may result from prolonged use of computers

​(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

​(b) List three factors be considered when deciding on the choice of an electronic data processing method

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

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

Headache, back and neck pain may result from use of computers. State how each of them can be minimised.

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Archives

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

State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)

(b) For each of the following give one reason why they are not allowed in a computer laboratory.

(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen

(b) List three factors be considered when deciding on the choice of an electronic data processing method

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

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