Code Converts and Multiplexers Questions and Answers

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Showing 10 of 48 questions
Q11
What control signals may be necessary to operate a 1-line-to-16 line decoder?
  • A flasher circuit control signal
  • B a LOW on all gate enable inputs
  • C input from a hexadecimal counter
  • D a HIGH on all gate enable circuits
Answer: Option B
Q12
One multiplexer can take the place of:
  • A several SSI logic gates
  • B combinational logic circuits
  • C several Ex-NOR gates
  • D several SSI logic gates or combinational logic circuits
Answer: Option D
Q13
How many exclusive-NOR gates would be required for an 8-bit comparator circuit?
  • A 4
  • B 6
  • C 8
  • D 10
Answer: Option C
Q14
How many inputs are required for a 1-of-10 BCD decoder?
  • A 4
  • B 8
  • C 10
  • D 1
Answer: Option A
Q15
A BCD decoder will have how many rows in its truth table?
  • A 10
  • B 9
  • C 8
  • D 3
Answer: Option A
Q16
How many possible outputs would a decoder have with a 6-bit binary input?
  • A 16
  • B 32
  • C 64
  • D 128
Answer: Option C
Q17
Most demultiplexers facilitate which type of conversion?
  • A decimal-to-hexadecimal
  • B single input, multiple outputs
  • C ac to dc
  • D odd parity to even parity
Answer: Option B
Q18
The inputs/outputs of an analog multiplexer/demultiplexer are:
  • A bidirectional
  • B unidirectional
  • C even parity
  • D binary-coded decimal
Answer: Option A
Q19
Why can a CMOS IC be used as both a multiplexer and a demultiplexer?
  • A It cannot be used as both.
  • B CMOS uses bidirectional switches.
Answer: Option B
Q20
One application of a digital multiplexer is to facilitate:
  • A data generation
  • B serial-to-parallel conversion
  • C parity checking
  • D data selector
Answer: Option D

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