Digital Electronics and Logic Design MCQs with answers Page - 3

Here, you will find a collection of MCQ questions on Digital Electronics and Logic Design. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. The hexadecimal number ‘A0’ has the decimal value equivalent to

  • (A) 80
  • (B) 256
  • (C) 100
  • (D) 160

A

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Q. The 2’s complement of the number 1101101 is

  • (A) 101110
  • (B) 111110
  • (C) 110010
  • (D) 10011

A

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Q. When simplified with Boolean Algebra (x + y)(x + z) simplifies to

  • (A) x
  • (B) x + x(y + z)
  • (C) x(1 + yz)
  • (D) x + yz

A

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Q. The code where all successive numbers differ from their preceding number by single bit is

  • (A) binary code.
  • (B) bcd.
  • (C) excess – 3.
  • (D) gray.

A

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Q. -8 is equal to signed binary number

  • (A) 10001000
  • (B) oooo1000
  • (C) 10000000
  • (D) 11000000

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Q. DeMorgan’s first theorem shows the equivalence of

  • (A) or gate and exclusive or gate.
  • (B) nor gate and bubbled and gate.
  • (C) nor gate and nand gate.
  • (D) nand gate and not gate

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Q. When signed numbers are used in binary arithmetic, then which one of the following notations would have unique representation for zero.

  • (A) sign- magnitude.
  • (B) 1’s complement.
  • (C) 2’s complement.
  • (D) 9’s compleme nt.

A

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Q. 1’s complement representation of decimal number of -17 by using 8 bit

  • (A) 1110 1110
  • (B) 1101 1101
  • (C) 1100 1100
  • (D) 0001 0001

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Q. The excess 3 code of decimal number 26 is

  • (A) 0100 1001
  • (B) 1011001
  • (C) 1000 1001
  • (D) 1001101

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