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JAMB and WAEC Computer Studies questions: Input and output devices

40 questions with answers and explanations. Tap an option to check yourself.

AllJAMBWAEC
All topicsAlgorithms and flowcharts · 39Application packages · 46Computer hardware and the CPU · 41Computer networks and the internet · 45Computer security, ethics and safety · 40Data processing and information · 40Evolution of computing · 42Input and output devices · 40Logic gates and Boolean algebra · 39Memory and storage devices · 44Number systems and data representation · 47Programming languages and BASIC · 43Software and operating systems · 42

  1. Question 21· Input and output devices· WAEC

    A device that reads the bars printed on goods in a supermarket is a

    Explanation and discussion

  2. Question 22· Input and output devices· JAMB

    The device that reads pencil marks on objective answer sheets is the

    Explanation and discussion

  3. Question 23· Input and output devices· WAEC

    A light pen is an

    Explanation and discussion

  4. Question 24· Input and output devices· WAEC

    Banks read the special characters on cheques using

    Explanation and discussion

  5. Question 25· Input and output devices· JAMB

    A laser printer produces print using

    Explanation and discussion

  6. Question 26· Input and output devices· WAEC

    A device that reads shaded answer sheets in objective examinations is

    Explanation and discussion

  7. Question 27· Input and output devices· WAEC

    A touchscreen is both

    Explanation and discussion

  8. Question 28· Input and output devices· JAMB

    A barcode reader is used mainly in

    Explanation and discussion

  9. Question 29· Input and output devices· JAMB

    A webcam is

    Explanation and discussion

  10. Question 30· Input and output devices· WAEC

    A device that converts printed text into editable text using OCR is a

    Explanation and discussion

  11. Question 31· Input and output devices· JAMB

    A dot-matrix printer is an

    Explanation and discussion

  12. Question 32· Input and output devices· WAEC

    An impact printer that can print multi-part carbon copies is

    Explanation and discussion

  13. Question 33· Input and output devices· JAMB

    Which of these is an input device?

    Explanation and discussion

  14. Question 34· Input and output devices· WAEC

    A plotter is used to produce

    Explanation and discussion

  15. Question 35· Input and output devices· WAEC

    A device used to convert printed pictures into digital form is the

    Explanation and discussion

  16. Question 36· Input and output devices· JAMB

    A scanner with software that turns printed text into editable text uses

    Explanation and discussion

  17. Question 37· Input and output devices· WAEC

    At a supermarket checkout, which device reads the product codes on items?

    Explanation and discussion

  18. Question 38· Input and output devices· JAMB

    Which device converts printed images into digital form?

    Explanation and discussion

  19. Question 39· Input and output devices· WAEC

    A biometric fingerprint scanner used at an exam centre is an

    Explanation and discussion

  20. Question 40· Input and output devices· JAMB

    Optical mark recognition (OMR) is used to

    Explanation and discussion

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