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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 361· Logic gates and Boolean algebra· JAMB

    The output of an AND gate is 1 only when

    Explanation and discussion

  2. Question 362· Logic gates and Boolean algebra· WAEC

    A circuit outputs 1 only when input A is 1 and input B is NOT 1. Which gate combination does this?

    Explanation and discussion

  3. Question 363· Logic gates and Boolean algebra· JAMB

    A half adder produces

    Explanation and discussion

  4. Question 364· Logic gates and Boolean algebra· WAEC

    A truth table shows

    Explanation and discussion

  5. Question 365· Logic gates and Boolean algebra· JAMB

    A NAND gate with both inputs at 1 gives an output of

    Explanation and discussion

  6. Question 366· Logic gates and Boolean algebra· JAMB

    A NOT gate

    Explanation and discussion

  7. Question 367· Logic gates and Boolean algebra· WAEC

    If the input to a NOT gate is 1, the output is

    Explanation and discussion

  8. Question 368· Logic gates and Boolean algebra· WAEC

    A NOT gate with input 1 gives an output of

    Explanation and discussion

  9. Question 369· Logic gates and Boolean algebra· WAEC

    For inputs A = 1 and B = 0, the output of a NOR gate is

    Explanation and discussion

  10. Question 370· Logic gates and Boolean algebra· WAEC

    A NAND gate is equivalent to

    Explanation and discussion

  11. Question 371· Logic gates and Boolean algebra· JAMB

    An XNOR gate gives 1 when

    Explanation and discussion

  12. Question 372· Logic gates and Boolean algebra· WAEC

    For an OR gate with inputs A = 0 and B = 1, the output is

    Explanation and discussion

  13. Question 373· Memory and storage devices· JAMB

    Virtual memory uses

    Explanation and discussion

  14. Question 374· Memory and storage devices· WAEC

    A device that stores data using laser light is

    Explanation and discussion

  15. Question 375· Memory and storage devices· WAEC

    A solid-state drive differs from a hard disk drive in that it

    Explanation and discussion

  16. Question 376· Memory and storage devices· JAMB

    A byte is made up of

    Explanation and discussion

  17. Question 377· Memory and storage devices· JAMB

    Memory whose contents are lost when the power is switched off is described as

    Explanation and discussion

  18. Question 378· Memory and storage devices· WAEC

    If a computer loses power while a document is unsaved, the work is lost because it was held in

    Explanation and discussion

  19. Question 379· Memory and storage devices· JAMB

    A USB flash drive stores data using

    Explanation and discussion

  20. Question 380· Memory and storage devices· WAEC

    The smallest unit of data in a computer is the

    Explanation and discussion

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