Digital Electronics and Logic Design MCQs with answers Page - 6

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Q. Perform 2’s complement subtraction of (7)10 − (11)10 .

  • (A) 1100 (or -4)
  • (B) 1101 (or -5)
  • (C) 1011 (or -3)
  • (D) 1110 (or -6)

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Q. What is the Gray equivalent of (25)10

  • (A) 1101
  • (B) 110101
  • (C) 10110
  • (D) 10101

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Q. Simplify the Boolean expression F = C(B + C)(A + B + C).

  • (A) c
  • (B) bc
  • (C) abc
  • (D) a+bc

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Q. Determine the binary numbers represented by 25.5

  • (A) 11001.1
  • (B) 11011.101
  • (C) 10101.11
  • (D) 11001.010 1

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Q. Conversion of decimal number 10.625 into binary number:

  • (A) 1010.101
  • (B) 1110.101
  • (C) 1001.11
  • (D) 1001.101

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Q. Conversion of fractional number 0.6875 into its equivalent binary number:

  • (A) 0.1011
  • (B) 0.1111
  • (C) 0.10111
  • (D) 0.0101

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Q. Perform the following subtractions using 2’s complement method. 01000 – 01001

  • (A) 1
  • (B) 10
  • (C) 11
  • (D) 11110

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Q. Subtraction of 01100-00011 using 2’s complement method. :

  • (A) 1001
  • (B) 1000
  • (C) 1010
  • (D) 110

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Q. Minimize the logic functionY(A,B,C,D) = IZm(0,1,2,3,5,7,8,9,11,14) . Using Karnaugh map.

  • (A) abc d + a b + b c + b d+ ad
  • (B) abc d + a b + b c + b d+ ad
  • (C) a b + b c + b d+ ad
  • (D) abc d + a b + b c + b d

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Q. Convert the decimal number 82.67 to its binary, hexadecimal and octal equivalents

  • (A) (1010010.1010 1011)2; (52.ab)16 ;
  • (B) (1010010.10 101011)2; (52.ab)16 ;
  • (C) (1010010.10 101011)2; (52.ab)16 ;
  • (D) (1010010.

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