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JAMB Computer Studies questions

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

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All topicsAlgorithms and flowcharts · 18Application packages · 21Computer hardware and the CPU · 20Computer networks and the internet · 22Computer security, ethics and safety · 18Data processing and information · 18Evolution of computing · 19Input and output devices · 18Logic gates and Boolean algebra · 18Memory and storage devices · 21Number systems and data representation · 23Programming languages and BASIC · 21Software and operating systems · 20

  1. Question 161· Logic gates and Boolean algebra· JAMB

    A NOR gate gives output 1 only when

    Explanation and discussion

  2. Question 162· Logic gates and Boolean algebra· JAMB

    The gate whose output is 1 only when its two inputs are different is the

    Explanation and discussion

  4. Question 164· Logic gates and Boolean algebra· JAMB

    De Morgan's law states that NOT(A AND B) equals

    Explanation and discussion

  5. Question 165· Logic gates and Boolean algebra· JAMB

    The output of an OR gate with inputs 0 and 1 is

    Explanation and discussion

  6. Question 166· Logic gates and Boolean algebra· JAMB

    The Boolean expression for an AND gate with inputs A and B is

    Explanation and discussion

  7. Question 167· Logic gates and Boolean algebra· JAMB

    By De Morgan's law, NOT (A AND B) equals

    Explanation and discussion

  8. Question 168· Logic gates and Boolean algebra· JAMB

    The output of an AND gate is 1 only when

    Explanation and discussion

  9. Question 169· Logic gates and Boolean algebra· JAMB

    A half adder produces

    Explanation and discussion

  10. Question 170· Logic gates and Boolean algebra· JAMB

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

    Explanation and discussion

  11. Question 171· Logic gates and Boolean algebra· JAMB

    A NOT gate

    Explanation and discussion

  12. Question 172· Logic gates and Boolean algebra· JAMB

    An XNOR gate gives 1 when

    Explanation and discussion

  13. Question 173· Memory and storage devices· JAMB

    Virtual memory uses

    Explanation and discussion

  14. Question 174· Memory and storage devices· JAMB

    A byte is made up of

    Explanation and discussion

  15. Question 175· Memory and storage devices· JAMB

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

    Explanation and discussion

  16. Question 176· Memory and storage devices· JAMB

    A USB flash drive stores data using

    Explanation and discussion

  17. Question 177· Memory and storage devices· JAMB

    Cloud storage keeps files

    Explanation and discussion

  18. Question 178· Memory and storage devices· JAMB

    One terabyte is approximately

    Explanation and discussion

  19. Question 179· Memory and storage devices· JAMB

    An optical disc such as a DVD is read by

    Explanation and discussion

  20. Question 180· Memory and storage devices· JAMB

    The memory that holds the instructions used to start up a computer is

    Explanation and discussion

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