Digital Electronics MCQ

Digital Electronics MCQ

  • Sharad Jaiswal
  • 12th Feb, 2021

We have listed below the best Digital Electronics MCQ Questions for your basic knowledge of Digital Electronics. This Digital Electronics MCQ Quiz contains 25 multiple Choice Questions. You have to select the right answer to every question. 

Digital Electronics MCQ

1) Which is the example of digital device from the given option?

  • A. Sensors
  • B.Microprocessors
  • C.Thermistors
  • D.Record players

2) In the boolean algebra, a variable has_______different state(s)/value(s).

  • A. 1
  • B.2
  • C.3
  • D.4

3) The universal gate is_______

  • A. OR gate
  • B.NAND gate
  • C.AND gate
  • D.All of the above

4) The only function of not gate is to ____________

  • A. Invert input signal
  • B.Stop signal
  • C.Act as a universal gate
  • D.None of the above

5) Which of the following is a digital device ?

  • A. Microphone
  • B.Regulator of a fan
  • C.Light switch
  • D.Resistance of a material

6) In positive logic, logic gate 1 corresponds to _______

  • A. zero voltage level
  • B.lower voltage level
  • C.positive voltage
  • D.higher voltage level

7) The Four common and useful MSI circuits are

  • A. Encoder
  • B.Decoder
  • C.Demultiplexer
  • D.All of the above

8) Truth table is used to express

  • A. Boolean map
  • B.Boolean matrix
  • C.Boolean addition
  • D.Boolean expression

9) What is a digital recorder ?

  • A. records analog data
  • B.records digital data
  • C.does not record data
  • D.records both analog and digital data View Answer

10) All logic operations can be obtained by means of

  • A. OR and NOR operations
  • B.OR and NOT operations
  • C.AND and NAND operations
  • D.AND, OR and NOT operations

11) NAND gate means ______

  • A. AND gates followed by an inverter
  • B.AND gate followed by OR gate
  • C.Inversion followed by AND gates
  • D.None of these

12) NOT gate means ________

  • A. NOT gate followed by an OR gate
  • B.OR gate followed by an inverter
  • C.NAND gate followed by an OR gate
  • D.Inversion followed by an OR gate

13) The inverter is

  • A. NOT gate
  • B.OR gate
  • C.AND gate
  • D.None of the above

14) Digital circuit can be made by the repeated use of ______

  • A. OR gates
  • B.NOT gates
  • C.NAND gates
  • D.None of the above

15) Demultiplex means are _______

  • A. Distributor
  • B.One into many
  • C.Many into one
  • D.One into many as well as Distributor

16) The output of the two input OR gate is high.

  • A. both inputs are low
  • B.both inputs are high
  • C.one input is high and second is low
  • D.at least oneof the input is low

17) The output of a two-input AND gate is high.

  • A. both inputs are low
  • B.both inputs are high
  • C.one input is high and second is low
  • D.at least oneof the input is low

18) Which gate followed by NOR gate and OR gate ?

  • A. AND gate
  • B.NOT gate
  • C.NAND gate
  • D.All of the above

19) ASCII code is a _______

  • A. 5 bit
  • B.7 bit
  • C.8 bit
  • D.9 bit

20) Which block replacement algorithm is not generally used cache operation ?

  • A. LRU
  • B.LIFO
  • C.FIFO
  • D.Random

21) The principle of locality of reference justifies the use are:

  • A. DMA
  • B.cache memory
  • C.virtual memory
  • D.Read Only Memory

22) A flip flop is a _______ circuit.

  • A. Sequential
  • B.Combinational
  • C.Conversion
  • D.All of the above

23) A stack is also known as:

  • A. LIFO memory
  • B.FIFO memory
  • C.Flash memory
  • D.Cache Memory

24) The full form of SIPO is:

  • A. Serial in Serial out
  • B.Serial in Parallel out
  • C.Serial In Peripheral Out
  • D.Parallel-in Serial-out

25) Slowest memory element _______

  • A. ROM
  • B.Cache
  • C.RAM
  • D.Hard Drive

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