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Digital Electronics

Digital Electronics
Maximum number in decimal that can be represented by 4 bits (binary) is

 4
 15
 7
 16

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Digital Electronics
An AND gate will function as OR if

All the inputs are ‘0’
All the inputs to the gates are “1”
Either of the inputs is “1”
All the inputs and outputs are complemente'

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Digital Electronics
How many stable state/states present in flip-flop ?

 2
 4
 3
 1

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Digital Electronics
The binary number designations of the rows and columns of the K-map are in

 Gray code
 BCD code
 binary code
 XS-3 code

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Digital Electronics
The set of which logic gates is designated as universal gate?

 XNOR, NOR, NAND.
  NOR , NAND.
 NOT, OR , AND.
 XNOR, NOR, NAND.

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to negative logic system.

 1 V and 5 V
 0 V and 5 V
 5 V and 0 V
 –1.5 V and – 0.5 V

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