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Digital Electronics

Digital Electronics
A + Ā is equal to

 1
 A
 0
 Ā

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Digital Electronics
Unit distance code is the other name of

 sequential code
 cyclic code
 XS-3 code
 self-complementing code

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Digital Electronics
In which of the following base systems is 123 not a valid number?

Base 16
Base 10
Base 3
Base 8

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Digital Electronics
What is the difference between xor gate and exor gate.

 xor gives two outputs while exor gives one
 xor gives one output while exor gives two
 both are same
 xor and exor are complement of each other

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Digital Electronics
A device which converts 2421 code into 8421code is called a

 code converter
 coder
 code decoder
 code encoder

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Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NAND gate?

 OR
 AND
 X-OR
 NOT

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