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  • Question

  • Define a race condition for a flip-flop.


  • Options
  • A. The inputs to a trigger device are changing slightly before the active trigger edge.
  • B. The inputs to a trigger device are changing slightly after the active trigger edge.
  • C. The inputs to a trigger device are changing at the same time as the active trigger edge.

  • Correct Answer
  • The inputs to a trigger device are changing at the same time as the active trigger edge. 

    • More questions

    • 1. VHDL was created as a very flexible language and it allows us to define the operation of clocked devices in the code without relying on logic primitives.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A demultiplexer takes a dual input data value and routes it to one of several outputs.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The output of a phototransister is determined by the presence or absence of light at its base input.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. In VHDL, in which declaration section is a COMPONENT declared?

    • Options
    • A. Architecture
    • B. Library
    • C. Entity
    • D. Port map
      • Discuss
    • 5. Digital circuits cannot perform logic comparisons since the circuit can have only one of two values at any instant.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The resolution of a 6-bit DAC is ________.

    • Options
    • A. 63%
    • B. 64%
    • C. 15.9%
    • D. 1.59%
      • Discuss
    • 7. Convert the binary number 1011010 to hexadecimal.

    • Options
    • A. 5B
    • B. 5F
    • C. 5A
    • D. 5C
      • Discuss
    • 8. The decimal fraction 1/4 can be written in binary as________.

    • Options
    • A. 0.010
    • B. 0.100
    • C. 0.110
    • D. 0.011
      • Discuss
    • 9. The gates in this figure are implemented using TTL logic. If the input of the inverter is open, and you apply logic pulses to point B, the output of the AND gate will be ________.


    • Options
    • A. a steady LOW
    • B. a steady HIGH
    • C. an undefined level
    • D. pulses
      • Discuss
    • 10. Why have PLDs taken over so much of the market?

    • Options
    • A. One PLD does the work of many ICs.
    • B. The PLDs are cheaper.
    • C. Less power is required.
    • D. All of the above
      • Discuss

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