Q. Which is not necessary when using bar codes in supermarkets?

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Q. Punched-card equipment was first introduced in Britain in 1904 by a small company. What was the name of that company?

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Q. Which of the following are often used to ensure that data has been accurately input to the computer?

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Q. An input device that converts data punched into paper lape into a binary format is

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Q. Regarding a VDU, which statement is more correct?

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Q. Plotter accuracy is measured in terms of repeatability and

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Q. An input/output device at which data enters or leaves a computer system is

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Q. The input and output devices are located away from the central computer facility in which particular type of processing.

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Q. The latest PC keyboards use a circuit that senses the movement by the change in its capacitance. What are these keyboards called?

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Q. A device that transmits messages in verbal form is

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Q. A device that converts one type of signal into another is called

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Q. Which method is of reading the characters & providing input to a computer.

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Q. A device that both transmits and receives data, is

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Q. A device used to bring information into a computer is

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Q. An input device that uses switch contacts placed under a plastic pad which may be inscribed with symbols is known as

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Q. A monitor looks like a TV set but it does not

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Q. Which device uses much less computer time than the light pen and gives resolutions equal to that of the CRT display.

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Q. A hand-held device which reads marks or characters on paper by detecting photo-sensitivity is known as

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Q. Tiny rings made of magnetic material that can be polarised to represent binary 1 or 0 is called

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Q. A hard copy would be prepared on a

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