Computer studies analysis of questions and answers

STATE THREE DIFFERENCES BETWEEN IMPACT PRINTERS AND NON-IMPACT PRINTERS.

27/4/2022

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State three differences between impact printers and non-Impact printers.

Impact printer

Noisy
Slow
Produce Low quality printouts
Production of multiple copies possible
Use more electric power

Non-Impact printer

Silent
Fast
Produce High quality printouts
Production of multiple copies impossible
Use lesser electric power

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STATE TWO TYPES OF COMPUTER OUTPUT DEVICES

24/1/2022

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LEVEL: FORM 1
TOPIC: COMPUTER SYSTEMS
SUB-TOPIC: OUTPUT DEVICES

EXPECTED RESPONSE

HARDCOPY OUTPUT DEVICES such as
1. printer
2. plotter
3. com
SOFTCOPY OUTPUT DEVICES such as
1. monitor
2. speakers
3. light emitting diode
4. projector

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List three uses of DVDs

13/11/2021

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List three uses of DVDs. (3mks)

entertainment – e.g. music, movie
distribution of software
archival storage

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

3/3/2021

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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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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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Identify the appropriate computer output device suitable for each of the following tasks:

10/1/2021

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State the meaning of the term disk defragmentation as used in computers.

(a) generating receipts where carbon copies are required;
(b)an architectural drawing where precision is required;
(c) producing document output for a visually impaired person.

(a)Carbon copies - impact printers e.g. dot matrix.
(b)Architectural design - plotter
(c)Visual impairment - speakers/brailles

Identify the appropriate computer output device suitable for each of the following tasks:

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List two techniques of acquiring electronic images to be used in a desktop publishing program.

10/1/2021

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List two techniques of acquiring electronic images to be used in a desktop publishing program.

(ii) Describe two layout guides in a desktop publishing program (DTP) that assist a user to place an object in a preferred position.
(b) Explain three ways of ensuring that data submitted for processing is accurate.
(c)An engineering company requires a computer system to design roads and bridges.
Explain one suitable choice for:
(i) output device;
(ii) software.

RESPONSES

(a) (i) Ways of acquiring images in DTP:

Scanning;
Picture capture via camera;
downloading;
getting from secondary storage.

(ii) Layout guides

Ruler guides: a ruler on the edges of the page that guides a user to position objects and resize them;
Margin guides: used to define page margins so that the user will be prevented from placing objects in non-printable areas of the page;
Column guides: Vertical lines used to divide a page into two or more columns;
Row guides: Lines used to divide a publication page into two or more section to help structure the layout;
Snap points: Positions on the screen where the object is stuck on.

(b) Ways of ensuring accuracy of data during data processing

Data is stored in secondary storage in such a way that access to it is controlled.
Encrypting of data before it is transmitted to minimize chances of it being compromised during transmission.
Use of validation methods to ensure that data is correct at the point of input.
Use of direct data capture methods which eliminates human errors.
Use of verification methods.

(c) (i) Output device: A plotter because it prints large size drawings to high precision.
(ii) A CAD software because it facilitates in the design of engineering drawings.

(ii) Describe two layout guides in a desktop publishing program (DTP) that assist a user to place an object in a preferred position. (b) Explain three ways of ensuring that data submitted for processing is accurate. (c)An engineering company requires a computer system to design roads and bridges. Explain one suitable choice for: (i) output device; (ii) software.

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List four factors to be considered when acquiring a printer.

8/1/2021

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List four factors to be considered when acquiring a printer.

Factors to consider when acquiring a printer

Initial cost;
Print quality (Number of pixels);
Running cost;
Speed of the printer;
Whether coloured or black & white;
Paper size;
Nature of work.
Volume of work
Technology involved eg. printing from storage media.

List four factors to be considered when acquiring a printer.

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Identify the appropriate output device for the production of each of the following:

6/1/2021

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Identify the appropriate output device for the production of each of the following:

(a) receipts where carbon copies are required;

Carbon copies - impact printers e.g. dot matrix.

(b) an architectural drawing where precision is required;

Architectural design - plotter

(c) output where the user is visually impaired.

Visual impairment -speakers/brailles.

Identify the appropriate output device for the production of each of the following:

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A law firm prefers to use hard Copy Output over soft Copy Output when handling documents for legal matters State two reasons for this preference

4/1/2021

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A law firm prefers to use hard Copy Output over soft Copy Output when handling documents for legal matters State two reasons for this preference (2 marks)

Advantages of hard copy output.

They are acceptable as exhibit in cases of litigation.
Can be used without a computer.
They are difficult to change without leaving any trace.
They can be used without power.
They can be used without the experience of computer usage.

A law firm prefers to use hard Copy Output over soft Copy Output when handling documents for legal matters State two reasons for this preference

Printer

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State three possible reasons for the extinction of daisy wheel printers in the market

4/1/2021

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State three possible reasons for the extinction of daisy wheel printers in the market. (3 marks)

Reasons why daisy wheel printer are in extinct.

They supported one font size and font face;
They were monochrome printers;
They produced noise while printing;
They were very slow;
Did not print graphics.
Had poor print quality.

daisy wheel printer

State three advantage of flat panel monitors over cathode ray tube monitors as used in computers

4/1/2021

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State three advantage of flat panel monitors over cathode ray tube monitors as used in computers. (3 marks)

Advantages of flat panel monitors.

They are compact and light weight;
They consume less power;
They do not suffer from geometrical distortions;
They do not cause eye fatigue.
They support many advanced technologies;
They can be made in almost any size and shape;
They support higher resolution.
Low heat radiation.

Cathode Ray Tube (CRT) Monitors

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The accounts department of a secondary school is using a system that generates invoices that are printed in triplicate using carbon papers.

4/1/2021

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The accounts department of a secondary school is using a system that generates invoices that are printed in triplicate using carbon papers.

(a) Name one type of printer suitable for this task.

Impact printer/Dot matrix/Daisy wheel.

(b) Give a reason for your answer in (a) above

It prints by using spokes which hit the paper hard.
The energy is transferred to attached carbon papers.

The accounts department of a secondary school is using a system that generates invoices that are printed in triplicate using carbon papers.

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List 3 differences between laser printer and a dot matrix printer

1/1/2021

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List 3 differences between laser printer and a dot matrix printer

Laser

(a) High print speed
(b) Can do no multiple jobs
(c) Quiet printing
(d) Uses photocopier technology
(e) High print quality

Dot-matrix printer

Dot matrix

(a) Low printing speed
(b) Can do multiple printing
(c) Noisy printing
(d) Characters formed by combination of dots
(e) Low print quality

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With reference to quality of print, noise level and cost, compare a dot matrix with a laser printer

31/12/2020

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With reference to quality of print, noise level and cost, compare a dot matrix with a laser printer

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Computer systems are built from three types of physical components: processors, memories and I/O Devices.

31/12/2020

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(a) State two tasks of a processor (2mks)

To control the use of main memory to store data & instructions
To control sequence of operations
To give instructions to all parts of the computer system
To carry out processing

(b) State the functions of I/O devices

Input
Used to enter data into the computer in a form the computer can store & process e.g. keyboard, mouse.
Output
Used to display the results of processing e.g. printer, monitor

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Distinguish between the following: CRT and LCD, OCR and OMR.

30/12/2020

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Distinguish between the following:CRT and LCD, OCR and OMR.

(a) CRT :- A display unit built around the vacuum tube containing one or more electron guns whose electron beams rapidly sweep horizontally across the inside of the front surface of the tube which is coated with a material that glows when irradiated. WHILE
LCD : - A type of display that uses a liquid compound having a polar molecular structure. sandwiched between two transparent electrodes. When an electric field is applied, the molecules
align with the field forming a crystalline arrangement that polarizes the light passing through it. A polarized filter laminated over the electrodes locks polarized light. In this way, a grid of electrodes
can selectively tum on” a cell,, or a pixel, containing the liquid crystal material turning it dark.
(b) OCR :- Type of scanning technology that reads special pre-printed characters and converts then into computer usable form, while
OMR :-Scanning technology that reads pencil marks and converts them into computer usable form.

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What is a computer keyboard?

30/12/2020

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(a) (i) What is a computer keyboard? (1mk)

Input device with keys for keying in data in the form of characters

List four types of keys found on a computer keyboard. Give an example of each. (4mks)

Alphanumeric
Function
Numeric key pad
Special character
Cursor control

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Explain the following input/ output terms as used in computer systems. Give an example for each

30/12/2020

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Explain the following input/ output terms as used in computer systems. Give an example for each (4mks)

(a) Read- get data from memory e.g. opening a file
(b) Write – put data into memory e.g. saving

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The diagram below represents the essential features of a computer system. Study the diagram and answer the questions that follow:

28/12/2020

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(a) The diagram below represents the essential features of a computer system. Study the diagram and answer the questions that follow:

(i) Name the components: (4mks)

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What are peripheral devices?

22/12/2020

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what are peripheral devices?

Any device connected externally to the CPU
A peripheral device is an internal or external device that connects directly to a computer or other digital device but does not contribute to the computer's primary function, such as computing.
It helps end users access and use the functionalities of a computer.-Techopedia

Give two examples of peripheral devices

Mouse,
Monitor,
Keyboard,
printer

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examples of output devices

20/10/2019

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OUTPUT DEVICES

Output devices are those devices that play the following roles:

display all activities as they happen in the system unit
convert information from machine readable form to human readable form
display input thus helping the user evaluate it.

EXAMPLES OF OUTPUT DEVICES

Monitor/screen/visual display unit (VDU);
printer;
plotter;
light emitting diode;
sound output (speakers/headphones);
braille reader;
projector;

differences between hardcopy and softcopy output devices

15/10/2019

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DIFFERENCES BETWEEN HARD COPY AND SOFT COPY OUTPUT DEVICES

Output from the computer can normally be in several forms. Give the difference between the following methods.
Soft copy and hard copy output

(2Marks)

#	SOFTCOPY	HARDCOPY
1	it is intangible	it is tangible
2	it is flexible in editing	cannot be easily edited
3	does not require stationery	requires stationery
4	they are cheap to produce	they are expensive to produce
5	easily transmissible	difficult to distribute
6	requires electrical signals to use	after printing does not require electrical signals
7	has no mass	has mass

State three differences between impact printers and non-Impact printers.

​Impact printer ​

Non-Impact printer

EXPECTED RESPONSE

HARDCOPY OUTPUT DEVICES such as

SOFTCOPY OUTPUT DEVICES such as

List three uses of DVDs. (3mks)

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

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

State the meaning of the term disk defragmentation as used in computers.

List two techniques of acquiring electronic images to be used in a desktop publishing program.

List four factors to be considered when acquiring a printer.

Identify the appropriate output device for the production of each of the following:

(a) receipts where carbon copies are required;

(b) an architectural drawing where precision is required;

(c) output where the user is visually impaired.

​A law firm prefers to use hard Copy Output over soft Copy Output when handling documents for legal matters State two reasons for this preference (2 marks)

​​State three possible reasons for the extinction of daisy wheel printers in the market. (3 marks)

Related Searches

​​State three advantage of flat panel monitors over cathode ray tube monitors as used in computers. (3 marks)

The accounts department of a secondary school is using a system that generates invoices that are printed in triplicate using carbon papers.

(a) Name one type of printer suitable for this task.

​(b) Give a reason for your answer in (a) above

​List 3 differences between laser printer and a dot matrix printer

Laser

Dot matrix

With reference to quality of print, noise level and cost, compare a dot matrix with a laser printer

​(a) State two tasks of a processor (2mks)

​(b) State the functions of I/O devices

Distinguish between the following:CRT and LCD, OCR and OMR.

​(a) (i) What is a computer keyboard? (1mk)

​List four types of keys found on a computer keyboard. Give an example of each. (4mks)

​Explain the following input/ output terms as used in computer systems. Give an example for each (4mks)

​​(i) Name the components: (4mks)

what are peripheral devices?

OUTPUT DEVICES

​EXAMPLES OF OUTPUT DEVICES

Categories

DIFFERENCES BETWEEN HARD COPY AND SOFT COPY OUTPUT DEVICES

Output from the computer can normally be in several forms. Give the difference between the following methods. Soft copy and hard copy output

Categories

Categories

Archives

Impact printer

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

A law firm prefers to use hard Copy Output over soft Copy Output when handling documents for legal matters State two reasons for this preference (2 marks)

State three possible reasons for the extinction of daisy wheel printers in the market. (3 marks)

State three advantage of flat panel monitors over cathode ray tube monitors as used in computers. (3 marks)

(b) Give a reason for your answer in (a) above

List 3 differences between laser printer and a dot matrix printer

(a) State two tasks of a processor (2mks)

(b) State the functions of I/O devices

(a) (i) What is a computer keyboard? (1mk)

List four types of keys found on a computer keyboard. Give an example of each. (4mks)

Explain the following input/ output terms as used in computer systems. Give an example for each (4mks)

(i) Name the components: (4mks)

EXAMPLES OF OUTPUT DEVICES

Output from the computer can normally be in several forms. Give the difference between the following methods.
Soft copy and hard copy output