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Home Digital Electronics Code Converters and Multiplexers Comments

  • Question
  • Which of the following is not a weighted value positional numbering system:


  • Options
  • A. hexadecimal
  • B. binary-coded decimal
  • C. binary
  • D. octal

  • Correct Answer
  • binary-coded decimal 


  • Code Converters and Multiplexers problems


    Search Results


    • 1. How is an encoder different from a decoder?

    • Options
    • A. The output of an encoder is a binary code for 1-of-N input.
    • B. The output of a decoder is a binary code for 1-of-N input.
    • Discuss
    • 2. A ripple counter's speed is limited by the propagation delay of:

    • Options
    • A. each flip-flop
    • B. all flip-flops and gates
    • C. the flip-flops only with gates
    • D. only circuit gates
    • Discuss
    • 3. A MOD-12 and a MOD-10 counter are cascaded. Determine the output frequency if the input clock frequency is 60 MHz.

    • Options
    • A. 500 kHz
    • B. 1,500 kHz
    • C. 6 MHz
    • D. 5 MHz
    • Discuss
    • 4. For a multistage counter to be truly synchronous, the ________ of each stage must be connected to ________.

    • Options
    • A. Cp, the same clock input line
    • B. CE, the same clock input line
    • C. , the terminal count output
    • D. , both clock input lines
    • Discuss
    • 5. Which segments (by letter) of a seven-segment display need to be active in order to display a digit 6?

    • Options
    • A. b, c, d, e, f, and g
    • B. a, c, d, e, f, and g
    • C. a, b, c, d, and f
    • D. b, c, d, e, and f
    • Discuss
    • 6. What do the mathematical symbols A < b and A > B mean?

    • Options
    • A. A < B means A is greater than B. A > B means A is less than B.
    • B. A > B means A is less than B. A < B means A is greater than B.
    • C. A < B means A is less than B. A > B means A is greater than B.
    • Discuss
    • 7. What is the status of the inputs S0, S1, and S2 of the 74151 eight-line multiplexer in order for the output Y to be a copy of input I5?

    • Options
    • A. S0 = 0, S1 = 1, S2 = 0
    • B. S0 = 0, S1 = 0, S2 = 1
    • C. S0 = 1, S1 = 1, S2 = 0
    • D. S0 = 1, S1 = 0, S2 = 1
    • Discuss
    • 8. Most demultiplexers facilitate which type of conversion?

    • Options
    • A. decimal-to-hexadecimal
    • B. single input, multiple outputs
    • C. ac to dc
    • D. odd parity to even parity
    • Discuss
    • 9. How many outputs are on a BCD decoder?

    • Options
    • A. 4
    • B. 16
    • C. 8
    • D. 10
    • Discuss
    • 10. How can the active condition (HIGH or LOW) or the decoder output be determined from the logic symbol?

    • Options
    • A. A bubble indicates active-HIGH.
    • B. A bubble indicates active-LOW.
    • C. A square indicates active-HIGH.
    • D. A square indicates active-LOW.
    • Discuss


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