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JAMB and WAEC Computer Studies questions

548 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 321· Input and output devices· JAMB

    A barcode reader is used mainly in

    Explanation and discussion

  2. Question 322· Input and output devices· JAMB

    A webcam is

    Explanation and discussion

  3. Question 323· Input and output devices· WAEC

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

    Explanation and discussion

  4. Question 324· Input and output devices· JAMB

    A dot-matrix printer is an

    Explanation and discussion

  5. Question 325· Input and output devices· WAEC

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

    Explanation and discussion

  6. Question 326· Input and output devices· JAMB

    Which of these is an input device?

    Explanation and discussion

  7. Question 327· Input and output devices· WAEC

    A plotter is used to produce

    Explanation and discussion

  8. Question 328· Input and output devices· WAEC

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

    Explanation and discussion

  9. Question 329· Input and output devices· JAMB

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

    Explanation and discussion

  10. Question 330· Input and output devices· WAEC

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

    Explanation and discussion

  11. Question 331· Input and output devices· JAMB

    Which device converts printed images into digital form?

    Explanation and discussion

  12. Question 332· Input and output devices· WAEC

    A biometric fingerprint scanner used at an exam centre is an

    Explanation and discussion

  13. Question 333· Input and output devices· JAMB

    Optical mark recognition (OMR) is used to

    Explanation and discussion

  14. Question 334· Logic gates and Boolean algebra· JAMB

    The output of a NAND gate with inputs 1 and 1 is

    Explanation and discussion

  15. Question 335· Logic gates and Boolean algebra· WAEC

    An XOR gate with inputs A = 1 and B = 1 gives an output of

    Explanation and discussion

  16. Question 336· Logic gates and Boolean algebra· JAMB

    A three-input truth table has

    Explanation and discussion

  17. Question 337· Logic gates and Boolean algebra· WAEC

    A NAND gate with inputs A = 1 and B = 1 gives

    Explanation and discussion

  18. Question 338· Logic gates and Boolean algebra· JAMB

    An AND gate with inputs A = 1 and B = 0 gives

    Explanation and discussion

  19. Question 339· Logic gates and Boolean algebra· JAMB

    In Boolean algebra, A · 0 equals

    Explanation and discussion

  20. Question 340· Logic gates and Boolean algebra· WAEC

    An AND gate gives output 1 only when

    Explanation and discussion

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