Digital Principles and System Design MCQs with answers Page - 1

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Q. If the decimal number is a fraction then its binary equivalent is obtained by the number continuously by 2.

  • (A) dividing
  • (B) multiplying
  • (C) adding
  • (D) subtracting

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Q. Binary coded decimal is a combination of

  • (A) two binary digits
  • (B) three binary digits
  • (C) four binary digits
  • (D) five binary digits

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Q. The decimal number 10 is represented in its BCD form as

  • (A) 10100000
  • (B) 01010111
  • (C) 00010000
  • (D) 00101011

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Q. Carry out BCD subtraction for (68) – (61) using 10’s complement method.

  • (A) 00000111
  • (B) 01110000
  • (C) 100000111
  • (D) 011111000

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Q. When numbers, letters or words are represented by a special group of symbols, this process is called

  • (A) decoding
  • (B) encoding
  • (C) digitizing
  • (D) inverting

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Q. A three digit decimal number requires for representation in the conventional BCD format.

  • (A) 3 bits
  • (B) 6 bits
  • (C) 12 bits
  • (D) 24 bits

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Q. How many bits would be required to encode decimal numbers 0 to 9999 in straight binary codes?

  • (A) 12
  • (B) 14
  • (C) 16
  • (D) 18

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Q. The excess-3 code for 597 is given by

  • (A) 100011001010
  • (B) 100010100111
  • (C) 010110010111
  • (D) 010110101101

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Q. The decimal equivalent of the excess-3 number 110010100011.01110101 is

  • (A) 970.42
  • (B) 1253.75
  • (C) 861.75
  • (D) 1132.87

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Q. In boolean algebra, the OR operation is performed by which properties?

  • (A) associative properties
  • (B) commutative properties
  • (C) distributive properties
  • (D) all of the mentioned

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