Input and Output Questions and Answers

Q: __________ is used to captures images in a digitized form that a computer can use.

Correct answer: Digital CameraA digital camera focuses the image onto a sensor array, which converts light into charge and then into digital values, so what it captures is already in the form the computer needs.A film camera captures an image too, but chemically, and it must be developed and then scanned before a computer can use it. A memory card only stores what the camera produced, and an indicator LED on the case captures nothing at all.

Q: A Facsimile Machine also called

Correct answer: Fax machineFacsimile means "an exact copy", and the machine sends one over a telephone line: it scans a page into a signal, transmits it, and the receiving machine prints it back out.So a fax machine is a scanner and a printer combined with a modem, which is why it is sometimes described as either - but the term for the whole is the fax machine, and the whole is more than either half. Its function is transmission, which neither a scanner nor a printer performs.

Q: Name the device that converts text information into spoken sentences.

Correct answer: Speech SynthesizersA speech synthesiser converts text into audible speech, so it is an output device - the counterpart of speech recognition, which converts speech into text and is an input function.Modern systems work by concatenating recorded fragments or by generating the waveform from a model, and the difficulty is prosody rather than pronunciation: producing the rhythm and intonation that make a sentence sound natural rather than a string of correctly pronounced words.

Q: Which of the following Printers have a speed in the range of 40-300 characters per second?

Correct answer: InkjetSpeeds in the range of tens to a few hundred characters per second describe a character printer, which forms one character at a time.An ink-jet works that way, moving a head across the paper. A laser printer prints a whole page at once and is quoted in pages per minute, and a drum printer prints a whole line at a time and is quoted in lines per minute - both far faster and measured in different units, which is what places them outside this range.

Q: Which of the following is a temporary output?

Correct answer: Soft copySoft copy is output that exists only while it is being displayed - an image on a screen, sound from a speaker - and it vanishes when the display changes or the power goes.Hard copy is output on a physical medium that persists, which is what a printer produces. The distinction is not about quality or permanence of the data but about the medium: the same document is soft copy on screen and hard copy once printed.

Q: Devices that let the computer communicate with you.

Correct answer: OutputAn output device is the one that carries information from the computer to the person - the monitor, the printer, the speakers. Input devices carry information the other way.

Q: Which technology is used by banks to read the numbers printed at the bottom of a cheque ?

Correct answer: MICRMagnetic Ink Character Recognition prints the cheque number, branch and account codes in ink containing iron oxide. Because the reader senses magnetism rather than shape, an overprinted stamp or a signature across the line does not defeat it.

Q: An optical scanner or simply a scanner is a ______________ electronic device used to read and capture printed text and images.

Correct answer: Light-SensingA scanner illuminates the document and measures the light reflected from it, using a row of light-sensitive elements - a CCD or contact image sensor - that converts brightness into a voltage and then into digital values.It is an input device, since it turns something physical into data the computer can use, so the "output" option has the direction wrong. Sound plays no part, and "controlled" describes nothing about how the device works.

Q: A device used for video games, flight simulators, training simulators and for controlling industrial robots.

Correct answer: JoystickA joystick reports the direction and extent of the lever's deflection, and often twist and several buttons besides - a continuous two-axis input that suits steering something.That is exactly what games, flight simulators and industrial robot controls need: an intuitive mapping from hand movement to the movement of the thing controlled. A mouse suits a flat desk and absolute positioning, a light pen points at a screen, and a keyboard enters characters.

21.

__________ is used to captures images in a digitized form that a computer can use.

A.Camera
B.LED on Front Panel of System Box
C.Digital Camera
D.Memory Card

Answer: C

Correct answer: Digital Camera

A digital camera focuses the image onto a sensor array, which converts light into charge and then into digital values, so what it captures is already in the form the computer needs.

A film camera captures an image too, but chemically, and it must be developed and then scanned before a computer can use it. A memory card only stores what the camera produced, and an indicator LED on the case captures nothing at all.

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22.

A Facsimile Machine also called

A.Scanner
B.Storage Device
C.Printer
D.Fax machine

Answer: D

Correct answer: Fax machine

Facsimile means "an exact copy", and the machine sends one over a telephone line: it scans a page into a signal, transmits it, and the receiving machine prints it back out.

So a fax machine is a scanner and a printer combined with a modem, which is why it is sometimes described as either - but the term for the whole is the fax machine, and the whole is more than either half. Its function is transmission, which neither a scanner nor a printer performs.

Discuss in Forum

23.

Name the device that converts text information into spoken sentences.

A.Speech Sensors
B.Compact convertors
C.Speech Synthesizers
D.Voice systems

Answer: C

Correct answer: Speech Synthesizers

A speech synthesiser converts text into audible speech, so it is an output device - the counterpart of speech recognition, which converts speech into text and is an input function.

Modern systems work by concatenating recorded fragments or by generating the waveform from a model, and the difficulty is prosody rather than pronunciation: producing the rhythm and intonation that make a sentence sound natural rather than a string of correctly pronounced words.

Discuss in Forum

24.

Which of the following Printers have a speed in the range of 40-300 characters per second?

A.Inkjet
B.Laser
C.Dot matrix
D.Drum

Answer: A

Correct answer: Inkjet

Speeds in the range of tens to a few hundred characters per second describe a character printer, which forms one character at a time.

An ink-jet works that way, moving a head across the paper. A laser printer prints a whole page at once and is quoted in pages per minute, and a drum printer prints a whole line at a time and is quoted in lines per minute - both far faster and measured in different units, which is what places them outside this range.

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25.

Which of the following is a temporary output?

A.Hard copy
B.Soft copy
C.Duplicate copy
D.On paper

Answer: B

Correct answer: Soft copy

Soft copy is output that exists only while it is being displayed - an image on a screen, sound from a speaker - and it vanishes when the display changes or the power goes.

Hard copy is output on a physical medium that persists, which is what a printer produces. The distinction is not about quality or permanence of the data but about the medium: the same document is soft copy on screen and hard copy once printed.

Discuss in Forum

26.

What is the main advantage of a laser printer over a dot matrix printer ?

A.It can print carbon copies
B.It produces faster, quieter and higher-quality output
C.It uses no consumables
D.It works without electricity

Answer: C

Correct answer: It produces faster, quieter and higher-quality output

A laser printer fuses toner to the page without striking it, giving sharp output at speed and with little noise. The one thing it cannot do is print through multi-part stationery, which remains the dot matrix printer’s niche.

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27.

Devices that let the computer communicate with you.

A.Input
B.Output
C.Type &nb

Answer: B

Correct answer: Output

An output device is the one that carries information from the computer to the person - the monitor, the printer, the speakers. Input devices carry information the other way.

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28.

Which technology is used by banks to read the numbers printed at the bottom of a cheque ?

A.OCR
B.MICR
C.OMR
D.Barcode scanning

Answer: B

Correct answer: MICR

Magnetic Ink Character Recognition prints the cheque number, branch and account codes in ink containing iron oxide. Because the reader senses magnetism rather than shape, an overprinted stamp or a signature across the line does not defeat it.

Discuss in Forum

29.

An optical scanner or simply a scanner is a ______________ electronic device used to read and capture printed text and images.

A.Sound-Sensing
B.Output
C.Controlled
D.Light-Sensing

Answer: D

Correct answer: Light-Sensing

A scanner illuminates the document and measures the light reflected from it, using a row of light-sensitive elements - a CCD or contact image sensor - that converts brightness into a voltage and then into digital values.

It is an input device, since it turns something physical into data the computer can use, so the "output" option has the direction wrong. Sound plays no part, and "controlled" describes nothing about how the device works.

Discuss in Forum

30.

A device used for video games, flight simulators, training simulators and for controlling industrial robots.

A.Mouse
B.Light pen
C.Joystick
D.Keyboard

Answer: C

Correct answer: Joystick

A joystick reports the direction and extent of the lever's deflection, and often twist and several buttons besides - a continuous two-axis input that suits steering something.

That is exactly what games, flight simulators and industrial robot controls need: an intuitive mapping from hand movement to the movement of the thing controlled. A mouse suits a flat desk and absolute positioning, a light pen points at a screen, and a keyboard enters characters.

Discuss in Forum

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