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JAMB Computer Studies questions: Logic gates and Boolean algebra

18 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 1· Logic gates and Boolean algebra· JAMB

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

    Explanation and discussion

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

    A three-input truth table has

    Explanation and discussion

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

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

    Explanation and discussion

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

    In Boolean algebra, A · 0 equals

    Explanation and discussion

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

    A truth table for a gate with 3 inputs has how many rows?

    Explanation and discussion

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

    An OR gate with inputs A = 0 and B = 1 gives an output of

    Explanation and discussion

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

    A NOR gate gives output 1 only when

    Explanation and discussion

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

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

    Explanation and discussion

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

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

    Explanation and discussion

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

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

    Explanation and discussion

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

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

    Explanation and discussion

  13. Question 13· Logic gates and Boolean algebra· JAMB

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

    Explanation and discussion

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

    The output of an AND gate is 1 only when

    Explanation and discussion

  15. Question 15· Logic gates and Boolean algebra· JAMB

    A half adder produces

    Explanation and discussion

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

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

    Explanation and discussion

  17. Question 17· Logic gates and Boolean algebra· JAMB

    A NOT gate

    Explanation and discussion

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

    An XNOR gate gives 1 when

    Explanation and discussion

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