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Digital Electronics

Digital Electronics
Which of the following codes is known as the 8421 code?

 BCD code
 ASCII code
 Gray code
 XS-3 code

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Digital Electronics
The switch which clears a flip-flop is know as

 Clear
 None
 Both A and B
 Reset

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Digital Electronics
Unit distance code is the other name of

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

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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
In Boolean algebra A.A is equal to

 A
 1
 A²
 2A

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Digital Electronics
How many input and output required for demultiplexer ?

 one input and many output
 one input and one output
None of these
 number of selection inputs and one output

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