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Digital Electronics

Digital Electronics
In which of the following codes do the successive characters differ in only 1-bit position?

 2421 code
 8421 code
 binary code
 cyclic code

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Digital Electronics
The output of a NOR gate is high

 only when all the inputs are low
 only when at least one input is high
 only when all the inputs are high
 only when at least one input is low

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Digital Electronics
A gate is enabled when its enable input is at logic 0. The gate is

 AND
 NAND
 NOR
 none of these

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Digital Electronics
Which of the following shows the correct attachment of even parity bit to the data 00001001?

 000001001
 000010010
 000010011
 100001001

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

 4
 1
 3
 2

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Digital Electronics
The X-OR and X-NOR gates can have how many inputs?

 4
 2
 any number
 1

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