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Digital Electronics

Digital Electronics
For a code to be self-complementing, the sum of all its weights must be

 10
 12
 9
 6

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

 ASCII code
 XS-3 code
 BCD code
 Gray code

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Digital Electronics
Switching circuits are

 analog circuits
 hybrid circuits
 digital circuits
 none of these

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Digital Electronics
What is the minimum number of NAND gates required to realize an X-OR gate?

 5
 4
 3
 6

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Digital Electronics
Which of the following is known as a mod-2 adder?

 X-OR gate
 NOR gate
 NAND gate
 X-NOR gate

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Digital Electronics
How many input and output required for demultiplexer ?

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

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