Digital Electronics and Logic Design MCQs with answers Page - 50

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 combinatorial logic circuit has memory characteristics that "remember" the inputs after they have been removed.

  • (A) true
  • (B) false
  • (C) none of the above
  • (D) can not predict

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Q. The dynamic hazard problem occurs in

  • (A) combinational circuit alone
  • (B) sequential circuit only
  • (C) both (a) and (b)
  • (D) none of these

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Q. A n-stage ripple counter will count up to

  • (A) 2n
  • (B) 2n-1
  • (C) n
  • (D) 2n-1

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Q. The clock signals are used in sequential logic circuits to

  • (A) tell the time of the day
  • (B) tell how much time has elapsed since the system was turned on
  • (C) carry parllel data signals
  • (D) synchroniz e events in various parts of system

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Q. 74L5138 chip functions as

  • (A) decoder/demu ltiplexer
  • (B) encoder
  • (C) multiplexer
  • (D) demultiple xer

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Q. A shift register can be used for

  • (A) digital delay line
  • (B) serial to parallel conversion
  • (C) parallel to serial conversion
  • (D) all of these

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Q. Popular application of flip-flop are

  • (A) transfer register
  • (B) shift registers
  • (C) counters
  • (D) all of these

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Q. For which of the following flip-flops, the output is clearly defined for all combinations of two inputs ?

  • (A) q type flip-flop
  • (B) r-s flip-lop
  • (C) j-k flip-lop
  • (D) d flip-flop

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Q. When a large number of analog signals are to be converted an analog multiplexer is used. In this case most suitable A.D. converter will be

  • (A) ripple carry counter type
  • (B) dual stop type
  • (C) forward counter type
  • (D) successive approxima tion type

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Q. To build a mod-19 counter the number of flip-flops required is

  • (A) 3
  • (B) 5
  • (C) 7
  • (D) 9

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