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IGCSE ICT chapter 2_ Input and output devices.
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IGCSE ICT chapter 2_ Input and output devices.
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IGCSE ICT chapter 2: Input and outputdevices
Manual input devices - correct answer-Devices that require human intervention to enter data
Direct input devices (Direct data entry) - correct answer-Data is entered directly without
human intervention. Usually when large amounts of similar data need to be entered
Optical Mark Recognition (OMR) - correct answer-Uses optical mark reader to detect marks
made in certain places on specially printed forms. Usually when imputting data from answer
sheets or registration forms
Magnetic ink character recognition (MICR) - correct answer-Uses a magnectic ink character
reader to input characters that have been printed in special magnetic ink. Usually used to
process bank cheques
Optical Characters Recognition (OCR) - correct answer-Use a scanner and software to
convert text or embedded images into a format that can be edited by a word process.
Usually when reading typed postcodes
Bar Codes - correct answer-A set of lines of different thicknesses that represent a number. It
is read using a bar code reading by shining a beam of light on the lines and detecting the
amount of light that reflected back.
Magnetic Stripe Readers - correct answer-Used to read magnetic stripe which is a thin band
of magnetic tape found on the back of credit, debit card, identity cards and electronic key
cards which can store data.
Chip-and-PIN Readers - correct answer-A chip on credit/debit cards to make them more
difficult for hackers to read.
Sensors - correct answer-Used to input data based on temperature, light levels, pressure, ...
Analogue-to-digital converter - correct answer-Used to convert analogue data to digital data
that the computer can understand
Data logging - correct answer-Automatically collects data over a period of time without the
need of human intervention. Usually used for weather monitoring, scientific experiments
Monitors (CRT and TFT) - correct answer-An output device that display text, graphics and
video
Dot Matrix Printers - correct answer-Use a set of pins to press an inked ribbon against the
paper to create colored dots. The dots' patterns can be controlled.
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