Digital Electronics and Logic Design MCQs with answers Page - 45

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Q. A Karnaugh map is similar to a truth table because it presents all the possible values of input variables and the resulting output of each value.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. The decimal “17” in BCD will be represented as 10001(right opt is not given)

  • (A) 11101
  • (B) 11011
  • (C) 10111
  • (D) 11110

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Q. Convert the binary number 10110 to Gray code:

  • (A) 11101
  • (B) 11001
  • (C) 10101
  • (D) 11100

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Q. The Gray code for decimal number 6 is equivalent to

  • (A) 1100
  • (B) 1001
  • (C) 101
  • (D) 110

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Q. What is the indication of a short on the input of a load gate?

  • (A) only the output of the defective gate is affected.
  • (B) there is a signal loss to all gates on the node.
  • (C) the affected node will be stuck in the low state.
  • (D) there is a signal loss to all gates on the node, and the affected node will be stuck in the low state.

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Q. In HDL, LITERALS is/are:

  • (A) digital systems.
  • (B) scalars.
  • (C) binary coded decimals.
  • (D) a numbering system.

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Q. Which of the following expressions is in the sum-of-products form?

  • (A) (a + b )(c + d )
  • (B) (ab )(cd )
  • (C) ab (cd )
  • (D) ab + cd

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Q. The carry propagation can be expressed as .

  • (A) cp = ab
  • (B) cp = a + b D.
  • (C) ---
  • (D) ---

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Q. A decoder can be used as a demultiplexer by .

  • (A) tying all enable pins low
  • (B) tying all data-select lines low
  • (C) tying all data- select lines high
  • (D) using the input lines for data selection and an enable line for data input

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Q. How many 4-bit parallel adders would be required to add two binary numbers each representing decimal numbers up through 30010?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4

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