Flashcards
Input and output devices
Flashcards do conjunto (7)
- 1What is the role of an input device?Input devices capture data from the 'outside world' and pass this to the CPU as binary data for further processing.
- 2How does an optical mouse work?An optical mouse uses light sensors to detect movement in the X and Y planes. An on-board processor then converts this information into binary data which can be passed to the CPU.
- 3What is meant by the term 'voice recognition'?Voice recognition is where speech is converted into text.
- 4Explain the difference between a magnetic stripe reader and a smart card reader.A magnetic stripe reader reads the orientation of magnetic particles on a tape, and converts this into digital data. Smart cards contain a chip with a microprocessor and some memory containing data. The reader then accesses the data stored on the card.
- 5What is meant by the term 'OCR' and what does it stand for?OCR stands for Optical Character Recognition. OCR software is used to analyse images that have been scanned in, and recognise typed characters on the image.
- 6How does a retina scanner work?Retina scanners use light to illuminate the pattern of blood vessel structure in the eye, and converts this into binary data to be sent to the CPU.
- 7What is a keyboard matrix circuit?Keyboard matrix circuits are used to determine which key has been pressed on a keyboard. It consists of rows and columns, and the controller determines the row-column combination at which the key was pressed, and sends this information to the CPU.
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- FlashCards sobre Input and output devices, criado por tomj98 em 02-03-2015.
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- tomj98
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