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  • Question

  • Which of the following best describes static memory devices?


  • Options
  • A. memory devices that are magnetic in nature and do not require constant refreshing
  • B. memory devices that are magnetic in nature and require constant refreshing
  • C. semiconductor memory devices in which stored data will not be retained with the power applied unless constantly refreshed
  • D. semiconductor memory devices in which stored data is retained as long as power is applied

  • Correct Answer
  • semiconductor memory devices in which stored data is retained as long as power is applied 

    • More questions

    • 1. The point(s) on this timing diagram where the Q output of a D latch will be HIGH is/are ________.


    • Options
    • A. point 4
    • B. points 3 and 4
    • C. points 1 and 2
    • D. points 4 and 5
      • Discuss
    • 2. The circuit shown below is a(n) ________.


    • Options
    • A. R/2R ladder D/A converter
    • B. four-bit decoder
    • C. binary-weighted-input DAC
    • D. four-bit A/D converter
      • Discuss
    • 3. A full-adder has a Cin = 0. What are the sum (∑) and the carry (Cout) when A = 1 and B = 1?

    • Options
    • A. ∑ = 0, Cout = 0
    • B. ∑ = 0, Cout = 1
    • C. ∑ = 1, Cout = 0
    • D. ∑ = 1, Cout = 1
      • Discuss
    • 4. What is the range of invalid TTL output voltage?

    • Options
    • A. 0.0?0.4 V
    • B. 0.4?2.4 V
    • C. 2.4?5.0 V
    • D. 0.0?5.0 V
      • Discuss
    • 5. Which of the following logic families has the highest maximum clock frequency?

    • Options
    • A. S-TTL
    • B. AS-TTL
    • C. HS-TTL
    • D. HCMOS
      • Discuss
    • 6. Can the automatic RC circuit be used to set a flip-flop rather than reset the flip-flop?

    • Options
    • A. yes
    • B. no
      • Discuss
    • 7. Determine the correct output for the multiplexer and its associated timing diagram given below.


    • Options
    • A. Ya
    • B. Yb
    • C. Yc
    • D. Yd
      • Discuss
    • 8. The device that generates a coded output from a single active numeric input line is ________.

    • Options
    • A. a decoder
    • B. a multiplexer
    • C. a comparator
    • D. an encoder
      • Discuss
    • 9. The 74194 4-bit bidirectional universal shift register has a wide range of applications.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The full-step sequence of a stepper motor always has two coils energized in any state of the sequence and typically causes ________ of shaft rotation per step.

    • Options
    • A. 5°
    • B. 10°
    • C. 15°
    • D. 20°
      • Discuss

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