Input and Output Questions and Answers

Q: Which of the following is a type of image scanner?

Correct answer: Flat-bedA flat-bed scanner holds the document face down on a glass platen while a moving carriage carrying the light source and sensor traverses beneath it.The arrangement suits bound books and fragile originals, since nothing is dragged through rollers. The other genuine type is the hand-held scanner, moved across the document by the user - and "hand-led" in the options is a misspelling of it, as "flat-held" is of the answer. Sheet-fed scanners are the third common form.

Q: Information that comes from an external source and is fed into computer software is called ____

Correct answer: InputData supplied to a program from outside is its input; what the program sends back is its output. Throughput is a measure of how much work a system completes, and a report is one form output may take.

Q: A printer is an

Correct answer: Output DeviceA printer takes data from the computer and renders it on paper, so the flow is outward and the classification follows - it is an output device.The direction of data is the test in every case: keyboards, mice and scanners send data in and are inputs; monitors, printers and speakers receive data and present it, and are outputs. A multifunction device does both, being a printer and a scanner in one case, but each function keeps its own classification.

Q: Printer resolution is measured in ________.

Correct answer: Dots per inchDots per inch counts how finely a printer can place ink or toner on the page, so a higher figure gives sharper text and images. Pixels per inch is the corresponding measure for a display, and characters per second measures speed rather than quality.

Q: Which of the following is not an example of hardware?

Correct answer: InterpreterAn interpreter is a program that executes source code line by line, so it is software. Scanners, printers and monitors are all physical devices and therefore hardware.

Q: A printer produces a hard copy output on a physical medium such as

Correct answer: Paper or Transparency FilmHard copy needs a physical medium, and printers handle several: ordinary paper, card, labels, envelopes and transparency film for overhead projection."Paper only" is therefore too narrow. A monitor produces soft copy, not hard, and a CD is a storage medium written by a drive rather than a printer - though a printer may print a label onto its surface, which is a different operation from recording data on it.

Q: A type of printer that produces quality output using technology similar to that of a photocopy machine is

Correct answer: Laser PrinterThe similarity to a photocopier is exact rather than approximate: both charge a photosensitive drum, discharge it selectively to form a latent image, develop it with toner and fuse the toner to the paper with heat.The difference is only in how the latent image is made - a laser scanning the drum against a reflected optical image. An ink-jet works quite differently, spraying droplets, and "non-impact printer" is the wider class both belong to rather than the particular technology.

Q: What will be the output of the following C code? #include <stdio.h> void main() { int a = -5; int k = (a++, ++a); printf("%d\n", k); }

Correct answer: -3The comma operator evaluates its left operand, discards the result, then evaluates the right and yields that value.So a++ runs first, taking a from −5 to −4 and yielding −5, which is thrown away. Then ++a takes a to −3 and yields −3, which is assigned to k. The comma also introduces a sequence point, so the two modifications of a are properly ordered and the behaviour is defined.

Q: The most common type of device for producing hard copy output is the

Correct answer: PrinterHard copy means output on a physical medium that persists when the power is removed, and the printer is by far the most common device producing it.A monitor produces soft copy, which vanishes when the display changes, and a speaker produces sound rather than any copy at all. A plotter does produce hard copy, but it is a specialised device for large drawings and is nothing like as common as the printer.

31.

Which of the following is a type of image scanner?

A.Flat-held
B.Hand-led
C.Flat-bed
D.Compact

Answer: C

Correct answer: Flat-bed

A flat-bed scanner holds the document face down on a glass platen while a moving carriage carrying the light source and sensor traverses beneath it.

The arrangement suits bound books and fragile originals, since nothing is dragged through rollers. The other genuine type is the hand-held scanner, moved across the document by the user - and "hand-led" in the options is a misspelling of it, as "flat-held" is of the answer. Sheet-fed scanners are the third common form.

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32.

Information that comes from an external source and is fed into computer software is called ____

A.Input
B.Output
C.Throughput &nb

Answer: A

Correct answer: Input

Data supplied to a program from outside is its input; what the program sends back is its output. Throughput is a measure of how much work a system completes, and a report is one form output may take.

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33.

A printer is an

A.Input Device
B.Scanner
C.Output Device
D.Storage Device

Answer: C

Correct answer: Output Device

A printer takes data from the computer and renders it on paper, so the flow is outward and the classification follows - it is an output device.

The direction of data is the test in every case: keyboards, mice and scanners send data in and are inputs; monitors, printers and speakers receive data and present it, and are outputs. A multifunction device does both, being a printer and a scanner in one case, but each function keeps its own classification.

Discuss in Forum

34.

Printer resolution is measured in ________.

A.Pixels per inch
B.Dots per inch
C.Characters per second
D.Hertz

Answer: B

Correct answer: Dots per inch

Dots per inch counts how finely a printer can place ink or toner on the page, so a higher figure gives sharper text and images. Pixels per inch is the corresponding measure for a display, and characters per second measures speed rather than quality.

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35.

Which of the following is not an example of hardware?

A.Scanner
B.Printer
C.Monitor &nb

Answer: D

Correct answer: Interpreter

An interpreter is a program that executes source code line by line, so it is software. Scanners, printers and monitors are all physical devices and therefore hardware.

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36.

A printer produces a hard copy output on a physical medium such as

A.Monitor
B.Paper or Transparency Film
C.CD
D.Paper only

Answer: B

Correct answer: Paper or Transparency Film

Hard copy needs a physical medium, and printers handle several: ordinary paper, card, labels, envelopes and transparency film for overhead projection.

"Paper only" is therefore too narrow. A monitor produces soft copy, not hard, and a CD is a storage medium written by a drive rather than a printer - though a printer may print a label onto its surface, which is a different operation from recording data on it.

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37.

A plotter is best suited to producing ________.

A.photographs
B.large engineering and architectural drawings
C.printed books
D.spreadsheets

Answer: D

Correct answer: large engineering and architectural drawings

A plotter draws continuous lines, so it renders vector artwork such as maps and building plans at large sizes without the stepped edges a dot-based printer would produce. This makes it standard in design and surveying offices.

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38.

A type of printer that produces quality output using technology similar to that of a photocopy machine is

A.Laser Printer
B.Scanner
C.Ink-Jet Printer
D.Non-Impact Printer

Answer: A

Correct answer: Laser Printer

The similarity to a photocopier is exact rather than approximate: both charge a photosensitive drum, discharge it selectively to form a latent image, develop it with toner and fuse the toner to the paper with heat.

The difference is only in how the latent image is made - a laser scanning the drum against a reflected optical image. An ink-jet works quite differently, spraying droplets, and "non-impact printer" is the wider class both belong to rather than the particular technology.

Discuss in Forum

39.

What will be the output of the following C code?

#include <stdio.h>
    void main()
    {
        int a = -5;
        int k = (a++, ++a);
        printf("%d\n", k);
    }

A.-3
B.-5
C.4
D.Undefined

Answer: A

Correct answer: -3

The comma operator evaluates its left operand, discards the result, then evaluates the right and yields that value.

So a++ runs first, taking a from −5 to −4 and yielding −5, which is thrown away. Then ++a takes a to −3 and yields −3, which is assigned to k. The comma also introduces a sequence point, so the two modifications of a are properly ordered and the behaviour is defined.

Discuss in Forum

40.

The most common type of device for producing hard copy output is the

A.Plotter
B.Monitor
C.Speaker
D.Printer

Answer: D

Correct answer: Printer

Hard copy means output on a physical medium that persists when the power is removed, and the printer is by far the most common device producing it.

A monitor produces soft copy, which vanishes when the display changes, and a speaker produces sound rather than any copy at all. A plotter does produce hard copy, but it is a specialised device for large drawings and is nothing like as common as the printer.

Discuss in Forum

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