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  • Question
  • The output of an AND gate is LOW ________.


  • Options
  • A. all the time
  • B. when any input is LOW
  • C. when any input is HIGH
  • D. when all inputs are HIGH

  • Correct Answer
  • when any input is LOW 


  • Digital Concepts problems


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    • 1. In the decimal numbering system, what is the MSD?

    • Options
    • A. The middle digit of a stream of numbers
    • B. The digit to the right of the decimal point
    • C. The last digit on the right
    • D. The digit with the most weight
    • Discuss
    • 2. What is an analog-to-digital converter?

    • Options
    • A. It makes digital signals.
    • B. It takes analog signals and puts them in digital format.
    • C. It allows the use of digital signals in everyday life.
    • D. It stores information on a CD.
    • Discuss
    • 3. In positive logic, ________.

    • Options
    • A. a HIGH = 1, a LOW = 0
    • B. a LOW = 1, a HIGH = 0
    • C. only HIGHs are present
    • D. only LOWs are present
    • Discuss
    • 4. Which format can send several bits of information faster?

    • Options
    • A. Parallel
    • B. Serial
    • C. Both are the same
    • D. Cannot tell
    • Discuss
    • 5. Digital representations of numerical values of quantities may BEST be described as having characteristics:

    • Options
    • A. that are difficult to interpret because they are continuously changing.
    • B. that vary constantly over a continuous range of values.
    • C. that vary in constant and direct proportion to the values they represent.
    • D. that vary in discrete steps in proportion to the values they represent.
    • Discuss
    • 6. Which of the following is a semiconductor memory?

    • Options
    • A. RAM
    • B. MAR
    • C. CD-ROM
    • D. CD
    • Discuss
    • 7. A periodic digital waveform has a pulse width (tw) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.

    • Options
    • A. 3.3%
    • B. 33.3%
    • C. 6%
    • D. 18%
    • Discuss
    • 8. Convert the fractional binary number 0001.0010 to decimal.

    • Options
    • A. 1.40
    • B. 1.125
    • C. 1.20
    • D. 1.80
    • Discuss
    • 9. PLCC packages have leads on ________.

    • Options
    • A. one side
    • B. two sides
    • C. three sides
    • D. four sides
    • Discuss
    • 10. Digital signals transmitted on a single conductor (and a ground) must be transmitted in:

    • Options
    • A. slow speed.
    • B. parallel.
    • C. analog.
    • D. serial.
    • Discuss


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