Computer studies analysis of questions and answers

Differentiate between a line printer and a page printer as used in computers

3/3/2021

Differentiate between a line printer and a page printer as used in computers. (2 marks)

A line printer is an impact printer that prints one entire line of text at a time
while a page printer is a non impact printer that prints a Whole page at a timer

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A school has been advised to employ a database administrator. State three responsibilities of this personnel in the school.

15/1/2021

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A school has been advised to employ a database administrator. State three responsibilities of this personnel in the school.

(b) Explain two ways in which computers can be used in the transport industry.
(c) Mary was advised to partition a hard disk for her computer. Explain two reasons that may have necessitated this.
(d) Explain a reason for conducting each of the following studies in systems development:
(i) Schedule feasibility;
(ii) Technical feasibility.

RESPONSES

a) Possible responsibilities of a database admin in a school

Carrying out school database backups.
Recovering of lost school data incase of system failure.
Ensuring the security and integrity of the school system.
Adding new users to the school system and managing the user’s accounts.
Designing and developing database application for the school.
Updating or maintaining database for the school.

b) Ways in which computers can be used in a transport industry.

Use of GPS to track vehicles, flights etc.
Bookings to different destinations can be done through the use of computers ( online booking).
The computers can also be used to reduce the speed of vehicles and bring sanity in the industry.
Managing human resource involved in the industry.

c) Reasons for partitioning hard disk

For security purposes, incase one partition fails the second partition remains functional.
If she requires backup copies to be stored in the same hard disk.
If she intends to install more than one operating system.

d) (I Schedule feasibility

To determine if the proposed solution can be developed within the required time.

(ii) Technical feasibility

To determine if the system can be supported by the available technology.

(b) Explain two ways in which computers can be used in the transport industry. (c) Mary was advised to partition a hard disk for her computer. Explain two reasons that may have necessitated this. (d) Explain a reason for conducting each of the following studies in systems development: (i) Schedule feasibility; (ii) Technical feasibility.

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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.

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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Describe each of the following computer cables: Parallel cable and Serial cable;

14/1/2021

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Describe each of the following computer cables: Parallel cable and Serial cable;

Description of computer cables
a) Parallel cable

It is a communication cable which has high speed of transmission and transmits several bits at the same time.

b) Serial cable

It is a communication cable which has low speed of transmission and bits follow one another in sequence or are transmitted one at a time.

Describe each of the following computer cables: Parallel cable and Serial cable;

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The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase

14/1/2021

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The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase

Factors to consider when purchasing a printer

Volume of work to be printed.
Maintenance cost below e.g. consumables like toners should be affordable.
Speed of printing.
Type of work to be printed; type of paper, paper size/user needs /range of capability.
Type of printout whether colour is required or not.
Compatibility with the existing hardware
Initial cost
availability of in the market
Portability / physical size

The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase

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State three characteristics of mainframe computers.

14/1/2021

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State three characteristics of mainframe computers.

Characteristics of mainframe

They have bigger memory capacity.
Have high processing power.
It supports multiprocessing.
Supports large number of users at the same time/ Supports several peripheral devices.
Runs so many applications at the same time.

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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

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Explain three ways in which an operating system provides data security in a computer system

14/1/2021

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Explain three ways in which an operating system provides data security in a computer system

Access control:

Deals with the problem of verifying /authenticating the identity of a user before permitting access to the request resource (e.g. use of passwords, user account);

Encryption

Transforming data into an unreadable format so that they are safely transmitted;

Firewalls

Filters out unwanted data and programs/criminals/hackers/malicoius persons;

Log files

A means by which transactions in a computer system can be recorded thereby detering potential infiltrators;
Alerts
Alerting a user when he/she is about to delete a file/folder.

(b)State two instances where observation is not a viable method of gathering data during system analysis stage.

When the analyst wants to collect confidential information,
When there is a large group of people involved in the system,
Where the people you want to gather information from are vastly dispersed

A device used to re-construct data signal during data transmission to its original strength/amplify/boost/regenerate.

II. router.

It is a device used to facilitate movement of data or packets between two or more LANS of different configuration (expansion of networks).
Delivers a packet/data directly to destination computers.
Interconnects different networks/provides network services.

(ii) The figure below shows a network based on the bus topology.

(b)State two instances where observation is not a viable method of gathering data during system analysis stage. When the analyst wants to collect confidential information, When there is a large group of people involved in the system, Where the people you want to gather information from are vastly dispersed (c) (i) State the role of each of the following data communication devices: I. repeater A device used to re-construct data signal during data transmission to its original strength/amplify/boost/regenerate. II. router. It is a device used to facilitate movement of data or packets between two or more LANS of different configuration (expansion of networks). Delivers a packet/data directly to destination computers. Interconnects different networks/provides network services. (ii) The figure below shows a network based on the bus topology.

I. Identify the component labelled P.

The component P is the terminator.

II. State the function of the component labelled P.

Terminator in a backbone is used to prevent data signal from bouncing back/absorb signals.

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Figure 2 shows a block diagram of a computer system and its peripheral devices. Use it and answer the questions that follow.

14/1/2021

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

No.19.(a) Figure 2 shows a block diagram of a computer system and its peripheral devices. Use it and answer the questions that follow. (i)Name two devices that may be used for storing data for a long duration. 2GB HDD 32 MB Rom (ii) Name three peripheral devices that are used for input. Mouse Scanner CD drive (iii)Name two other devices that a Computer Aided Design (CAD) user might wish to add to the set up above in order to perform his tasks effectively. Digitizer Keyboard USB port 19 (b) A customer wishes to purchase a computer system. The customer can buy word processor, spreadsheet, database, and a drawing package separately or as an integrated package. State three reasons why the customer would prefer an integrated package to separate packages The software provides easy movement of data among the separate applications, A common group of commands is used for all the applications in the software package, Provides easy switching between functions without having to go back to the operating system and ability to share data between functions.

(i)Name two devices that may be used for storing data for a long duration.

2GB HDD
32 MB Rom

(ii) Name three peripheral devices that are used for input.

Mouse
Scanner
CD drive

(iii)Name two other devices that a Computer Aided Design (CAD) user might wish to add to the set up above in order to perform his tasks effectively.

Digitizer
Keyboard
USB port

(b) A customer wishes to purchase a computer system. The customer can buy word processor, spreadsheet, database, and a drawing package separately or as an integrated package. State three reasons why the customer would prefer an integrated package to separate packages

The software provides easy movement of data among the separate applications,
A common group of commands is used for all the applications in the software package,
Provides easy switching between functions without having to go back to the operating system and ability to share data between functions.

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The C directory of a computer has folders named Form 1, Form 2,Form 3 and Form 4. Each class has students' folders named according to their admission number. The students created their own folder for subjects they are studying based on the table shown be

12/1/2021

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The C directory of a computer has folders named Form 1, Form 2,Form 3 and Form 4. Each class has students' folders named according to their admission number. The students created their own folder for subjects they are studying based on the table shown below:

(a) A form four student intends to create a folder named proj to store project documents.
State the path for the project folder.

C:\FORM4\STUDNO\ADB\PROJECT

(b) Suggest how the student can ensure that:
(i) work is not lost in case the hard disk fails;

Keep backup copies of the project on offline secondary storage media.

(ii) the project is not copied by other students.

Use passwords for opening and modifying the project

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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 functions of each of the following keys on the computer keyboard:

12/1/2021

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State the functions of each of the following keys on the computer keyboard:

(a) backspace;

moves the display cursor one position backwards, deletes the character at that position, and shifts back the text after that position by one position

(b)insert (ins)

When insert is selected, keys add characters to the screen at the cursor (insertion point) without deleting those already there. When typeover is selected the new characters type over the old, deleting them as they go

State the functions of each of the following keys on the computer keyboard:

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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

Low memory
Less powerful processing speed
Used transistors to process

Third generation computers

Larger memory
More powerful processing speed
Used integrated circuits to process

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)

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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ANALYSIS OF KCSE COMPUTER STUDIES TOPICAL QUESTIONS & REVISION KITS

Differentiate between a line printer and a page printer as used in computers

Differentiate between a line printer and a page printer as used in computers. (2 marks)

A school has been advised to employ a database administrator. State three responsibilities of this personnel in the school.

A school has been advised to employ a database administrator. State three responsibilities of this personnel in the school.

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.

Describe each of the following computer cables: Parallel cable and Serial cable;

Describe each of the following computer cables: Parallel cable and Serial cable;

The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase

The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase

State three characteristics of mainframe computers.

State three characteristics of mainframe computers.

State three features of fifth generation computers.

State three features of fifth generation computers.

Explain three ways in which an operating system provides data security in a computer system

Explain three ways in which an operating system provides data security in a computer system

Figure 2 shows a block diagram of a computer system and its peripheral devices. Use it and answer the questions that follow.

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

The C directory of a computer has folders named Form 1, Form 2,Form 3 and Form 4. Each class has students' folders named according to their admission number. The students created their own folder for subjects they are studying based on the table shown be

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 the functions of each of the following keys on the computer keyboard:

State the functions of each of the following keys on the computer keyboard:

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

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

Second Generation Computers

Third generation 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)

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ANALYSIS OF KCSE COMPUTER STUDIES TOPICAL QUESTIONS & REVISION KITS

​Differentiate between a line printer and a page printer as used in computers. (2 marks)

A school has been advised to employ a database administrator. State three responsibilities of this personnel in the school.

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.

Describe each of the following computer cables: Parallel cable and Serial cable;

The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase

State three characteristics of mainframe computers.

State three features of fifth generation computers.

Explain three ways in which an operating system provides data security in a computer system

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

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

State the functions of each of the following keys on the computer keyboard:

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

Second Generation Computers

Third generation computers

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

Categories

Archives

Differentiate between a line printer and a page printer as used in computers. (2 marks)

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

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