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Digital Electronics

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

 X-OR
 OR
 AND
 NAND

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Digital Electronics
A device which converts 2421 code into 8421code is called a

 coder
 code converter
 code decoder
 code encoder

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

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

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Digital Electronics
What logic function is produced by adding inverters to the inputs of an OR gate?

 NAND
 NOR
 X-NOR
 AND

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Digital Electronics
10’s complement of 63325600 is

 36674400
 36774400
 366744399
 633256600

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Digital Electronics
The difference between the diagram of a NOR and OR gate is

 NOR has got a bubble at its output terminal
 OR is more squared than NOR
 OR is more oval than NOR
 OR has got a bubble at its output terminal

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