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Digital Electronics

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
In the boolean algebra, a variable has ________ different state(s)/value(s).

 1
 4
 3
 2

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Digital Electronics
The inputs of a NAND gate are connected together. The resulting circuit is ___________.

OR gate
AND gate
NOT gate
None of these

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Digital Electronics
Choose the option which is not a code conversion standard

 Gray code
 BCD code
 Truth code
 Excess-3 code

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Digital Electronics
The most suitable gate to check whether the number of 1s in a digital word is even or odd is

 X-OR
 AND, OR, and NOT
 NOR
 NAND

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Digital Electronics
A three-state buffer has the following output states

 1, 0, float
 Both A and B
 High, Low, Float
 Set, Reset, Halt

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