Digital Electronics and Logic Design MCQs with answers Page - 5

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Q. When an input signal A=11001 is applied to a NOT gate serially, its output signal is

  • (A) 111
  • (B) 110
  • (C) 10101
  • (D) 11001

A

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Q. A universal logic gate is one, which can be used to generate any logic function. Which of the following is a universal logic gate?

  • (A) or
  • (B) and
  • (C) xor
  • (D) nand

A

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Q. Karnaugh map is used for the purpose of

  • (A) reducing the electronic circuits used.
  • (B) to map the given boolean logic function.
  • (C) to minimize the terms in a boolean expression.
  • (D) to maximize the terms of a given a boolean expression .

A

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Q. The 2’s complement of the number 1101110 is

  • (A) 10001
  • (B) 10001
  • (C) 10010
  • (D) none

A

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Q. How many two input AND gates and two input OR gates are required to realize Y = BD+CE+AB

  • (A) 11
  • (B) 42
  • (C) 32
  • (D) 23

A

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Q. Which of following are known as universal gates

  • (A) nand & nor
  • (B) and & or.
  • (C) xor & or.
  • (D) none.

A

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Q. Convert the octal number 7401 to Binary.

  • (A) 1.111e+11
  • (B) 1.1111e+11
  • (C) 1.111e+11
  • (D) 1.11e+11

A

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Q. Find the hex sum of (93)16 + (DE)16 .

  • (A) (171)16
  • (B) (271)16
  • (C) (179)16
  • (D) (181)16

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