Digital Electronics and Logic Design MCQs with answers Page - 10

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Q. which of the following rules states that if one input of an AND gate is always 1, the output is equal to the other input?

  • (A) a +1 =1
  • (B) a +a =a
  • (C) a.a = a
  • (D) a.1= a

A

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Q. Which of the number is not a representative of hexadecimal system

  • (A) 1234
  • (B) abcd
  • (C) 1001
  • (D) defh

A

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Q. NOR gate is formed by connecting

  • (A) or gate and then not gate
  • (B) not gate and then or gate
  • (C) and gate and then or gate
  • (D) or gate and then and gate

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Q. The AND Gate performs a logical function

  • (A) addition
  • (B) subtraction
  • (C) multiplicatio
  • (D) division

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Q. The Extended ASCII Code (American Standard Code for Information Interchange) is a code

  • (A) 2-bit
  • (B) 7-bit
  • (C) 8-bit
  • (D) 16-bit

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Q. The OR gate performs Boolean .

  • (A) multiplication
  • (B) subtraction
  • (C) division
  • (D) addition

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Q. The output of an AND gate is one when

  • (A) all of the inputs are one
  • (B) any of the input is one
  • (C) any of the input is zero
  • (D) all the inputs are zero

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Q. A logic circuit with an output X = A(Bar)BC+AB(Bar) consists of .

  • (A) two and gates, two or gates, two inverters
  • (B) three and gates, two or gates, one inverter
  • (C) two and gates, one or gate, two inverters
  • (D) two and gates, one or gate

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Q. The boolean expression X = AB + CD represents

  • (A) two ors anded together
  • (B) a 4-input and gate
  • (C) two ands ored together
  • (D) an exclusive- or

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