Digital Electronics and Logic Design MCQs with answers Page - 20

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. A standard SOP form has terms that have all the variables in the domain of the expression.

  • (A) sum
  • (B) sub
  • (C) mult
  • (D) div

A

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Q. How many data select lines are required for selecting eight inputs?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4

A

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Q. Half adder circuit is ?

  • (A) half of an and gate
  • (B) a circuit to add two bits together
  • (C) half of a nand gate
  • (D) none of above

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Q. The full adder adds the Kth bits of two numbers to the

  • (A) difference of the previous bits
  • (B) sum of all previous bits
  • (C) carry from ( k - 1 )th bit
  • (D) sum of previous bit

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Q. The number of two input multiplexers required to construct a 210 input multiplexer is,

  • (A) 31
  • (B) 10
  • (C) 127
  • (D) 1023

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Q. A small dot or circle printed on top of an IC indicates

  • (A) vcc
  • (B) gnd
  • (C) pin 14
  • (D) pin 1

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Q. Which of the following adders can add three or more numbers at a time ?

  • (A) parallel adder
  • (B) carry-look- ahead adder
  • (C) carry-save- adder d.
  • (D) full adder

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Q. An AND circuit

  • (A) is a memory circuit
  • (B) gives an output when all input signals are present simultaneous ly
  • (C) is a -ve or gate
  • (D) is a linear circuit

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Q. What are the three output conditions of a three-state buffer?

  • (A) high, low, float
  • (B) 1, 0, float
  • (C) both of the above
  • (D) neither of the above

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Q. The device which changes from serial data to parallel data is

  • (A) counter
  • (B) multiplexe r
  • (C) demultiple xer
  • (D) flip-flop

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