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  • Question
  • Digital systems have ________.


  • Options
  • A. one state
  • B. two states
  • C. three states
  • D. four states

  • Correct Answer
  • two states 


  • Digital Concepts problems


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    • 1. It is possible to have an overlap between high and low levels in digital logic.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. The real world is mainly analog.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. The time interval on the leading edge of a pulse between 10% and 90% of the amplitude is the rise time.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. With an AND gate, if one input is HIGH, the output reflects the other input.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. A microcomputer is not a general-purpose computer.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. The horizontal axis of an oscilloscope is normally calibrated in units of ________.

    • Options
    • A. voltage
    • B. current
    • C. time
    • D. frequency
    • Discuss
    • 7. The digit that changes most often when counting is called the ________.

    • Options
    • A. LSB
    • B. LL Bean
    • C. LED
    • D. LCD
    • Discuss
    • 8. The controls on an oscilloscope that will help obtain a stable display are in the ________.

    • Options
    • A. vertical section
    • B. horizontal section
    • C. trigger section
    • D. display section
    • Discuss
    • 9. The duty cycle of a square wave is ________.

    • Options
    • A. 10%
    • B. 25%
    • C. 50%
    • D. 100%
    • Discuss
    • 10. A set of instructions for a computer is called a(n) ________.

    • Options
    • A. instruction manual
    • B. logic unit
    • C. program
    • D. diagram
    • Discuss


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