Exercise 3

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Exercise 3

  1. 1. SPN 21 ComputerStudies- Inputdevices Exercise 3 Answerall the questions. a) State the differencesbetweenManual andAutomaticinputdevices. [5] b) Discussthe advantagesof usingkeyboardovertypewriter. [5] c) Give the functionsforeachof the followinginputdevices. i.Scanner.[2] ii.Microphone.[2] iii.Sensors.[2] iv.MICR. [2] v. Graphicstablet.[2] d) Barcode readeris a hand-heldorstationaryinputdeviceusedtocapture andread informationcontainedina bar code. i.Explainhowitworks. [5] ii.Identifythe fivebasickindsof barcode reader. [5] [Total: 30 Marks]

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