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Home ‣ Digital Electronics ‣ Code Converters and Multiplexers Comments
  • Question

  • How many inputs will a decimal-to-BCD encoder have?


  • Options
  • A. 4
  • B. 8
  • C. 10
  • D. 16

  • Correct Answer
  • 10 

    • Code Converters and Multiplexers problems

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    • 1. In a Gray code, each number is 3 greater than the binary representation of that number.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. A truth table with output columns numbered 0?15 may be for which type of decoder IC?

    • Options
    • A. hexadecimal 1-of-16
    • B. dual octal outputs
    • C. binary-to-hexadecimal
    • D. hexadecimal-to-binary
      • Discuss
    • 3. A binary code that progresses such that only one bit changes between two successive codes is:

    • Options
    • A. nine's-complement code
    • B. 8421 code
    • C. excess-3 code
    • D. Gray code
      • Discuss
    • 4. Why is a demultiplexer called a data distributor?

    • Options
    • A. The input will be distributed to one of the outputs.
    • B. One of the inputs will be selected for the output.
    • C. The output will be distributed to one of the inputs.
      • Discuss
    • 5. What is the function of an enable input on a multiplexer chip?

    • Options
    • A. to apply Vcc
    • B. to connect ground
    • C. to active the entire chip
    • D. to active one half of the chip
      • Discuss
    • 6. How many inputs are required for a 1-of-16 decoder?

    • Options
    • A. 2
    • B. 4
    • C. 8
    • D. 16
      • Discuss
    • 7. How many exclusive-NOR gates would be required for an 8-bit comparator circuit?

    • Options
    • A. 4
    • B. 6
    • C. 8
    • D. 10
      • Discuss
    • 8. The inputs/outputs of an analog multiplexer/demultiplexer are:

    • Options
    • A. bidirectional
    • B. unidirectional
    • C. even parity
    • D. binary-coded decimal
      • Discuss
    • 9. One way to convert BCD to binary using the hardware approach is:

    • Options
    • A. with MSI IC circuits
    • B. with a keyboard encoder
    • C. with an ALU
    • D. UART
      • Discuss
    • 10. If two inputs are active on a priority encoder, which will be coded on the output?

    • Options
    • A. the higher value
    • B. the lower value
    • C. neither of the inputs
    • D. both of the inputs
      • Discuss

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