Digital Electronics and Logic Design MCQs with answers Page - 21

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Q. A device which converts BCD to Seven Segment is called

  • (A) multiplexer
  • (B) demultipl exer
  • (C) encoder
  • (D) decoder

A

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Q. How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?

  • (A) 1
  • (B) 2
  • (C) 4
  • (D) 8

A

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Q. A device which converts BCD to Seven Segment is called

  • (A) encoder
  • (B) decoder
  • (C) multiplexer
  • (D) demultiple xer

A

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Q. A multiplexer is a logic circuit that

  • (A) accepts one input and gives several output
  • (B) accepts many inputs and gives many output
  • (C) accepts many inputs and gives one output
  • (D) accepts one input and gives one output

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Q. In order to implement a n variable switching function, a MUX must have

  • (A) 2n inputs
  • (B) 2n+1 inputs
  • (C) 2n-1 inputs
  • (D) 2n-1 inputs

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Q. The inverter OR-gate and AND gate are called deeision-making elements because they can recognize some input while disregarding others. A gate

  • (A) words,high
  • (B) bytes,low
  • (C) bytes,high
  • (D) character,l ow

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Q. How many inputs are required for a 1-of-10 BCD decoder?

  • (A) 4
  • (B) 8
  • (C) 10
  • (D) 1

A

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Q. Most demultiplexers facilitate which of the following?

  • (A) decimal to hexadecimal
  • (B) single input, multiple outputs
  • (C) ac to dc
  • (D) odd parity to even parity

A

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Q. One application of a digital multiplexer is to facilitate:

  • (A) code conversion
  • (B) parity checking
  • (C) parallel-to- serial data conversion
  • (D) data generation

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Q. Select one of the following statements that best describes the parity method of error detection:

  • (A) best suited for detecting single-bit errors in transmitted codes.
  • (B) best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
  • (C) a and b
  • (D) none of the above

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