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Home ‣ Digital Electronics ‣ Logic Gates Comments
  • Question

  • Which of the following gates has the exact inverse output of the OR gate for all possible input combinations?


  • Options
  • A. NOR
  • B. NOT
  • C. NAND
  • D. AND

  • Correct Answer
  • NOR 

    • Logic Gates problems

    Search Results

    • 1. How many inputs of a four-input AND gate must be HIGH in order for the output of the logic gate to go HIGH?

    • Options
    • A. any one of the inputs
    • B. any two of the inputs
    • C. any three of the inputs
    • D. all four inputs
      • Discuss
    • 2. If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?

    • Options
    • A. 1
    • B. 2
    • C. 7
    • D. 8
      • Discuss
    • 3. The format used to present the logic output for the various combinations of logic inputs to a gate is called a(n):

    • Options
    • A. Boolean constant
    • B. Boolean variable
    • C. truth table
    • D. input logic function
      • Discuss
    • 4. The basic types of programmable arrays are made up of ________.

    • Options
    • A. AND gates
    • B. OR gates
    • C. NAND and NOR gates
    • D. AND gates and OR gates
      • Discuss
    • 5. A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a problem with the circuit and if so, what is the problem?


    • Options
    • A. Pin 6 should be ON.
    • B. Pin 8 should be ON.
    • C. Pin 8 should be pulsing.
    • D. no problem
      • Discuss
    • 6. How many inputs are on the logic gates of a 74HC21 IC?

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 7. A CMOS IC operating from a 3-volt supply will consume ________.

    • Options
    • A. less power than a TTL IC
    • B. more power than a TTL IC
    • C. the same power as a TTL IC
    • D. no power at all
      • Discuss
    • 8. The output of an OR gate with three inputs, A, B, and C, is LOW when ________.

    • Options
    • A. A = 0, B = 0, C = 0
    • B. A = 0, B = 0, C = 1
    • C. A = 0, B = 1, C = 1
    • D. all of the above
      • Discuss
    • 9. What is the name of a digital circuit that produces several repetitive digital waveforms?

    • Options
    • A. an inverter
    • B. an OR gate
    • C. a Johnson shift counter
    • D. an AND gate
      • Discuss
    • 10. The basic logic gate whose output is the complement of the input is the:

    • Options
    • A. OR gate
    • B. AND gate
    • C. inverter
    • D. comparator
      • Discuss

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