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Digital Electronics

Digital Electronics
Which of the following operations is commutative but not associative?

 OR
 NAND
 AND
 X-OR

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Digital Electronics
A D-flip-flop is said to be transparent when

 the output follow input
 the output is LOW
 the output follows clock
 the output is HIGH

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Digital Electronics
How many output is high of NOR GATE ?

 2
 3
 4
 1

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Digital Electronics
In simplification of a Boolean function of n variables, a group of 2m adjacent 1s leads to a term with

 m + 1 literals less than the total number of variables
 n + m literals
 n – m literals
 m – 1 literals less than the total number of variables

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Digital Electronics
In which code do the successive code characters differ in only one position?

 Hamming code
 8421 code
 XS-3 code
 Gray code

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Digital Electronics
A byte is equal to ________ bits.

 32
 16
 8
 4

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