Input and Output Questions and Answers

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.