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Digital Electronics

Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NOR gate?

 OR
 AND
 X-NOR
 NAND

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Digital Electronics
To get an excess-3 code from BCD code

 0011 is subtracted
 0110 is added
 0011 is added
 0110 is subtracted

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Digital Electronics
(1D)16 in BCD 8421 code is

 00100100
 00011101
 00101001
 00011111

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Digital Electronics
In Boolean algebra, the bar sign (-) indicates ___________.

AND operation
OR operation
NOT operation
None of these

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Digital Electronics
The NOR gate can function as a NOT gate if

 one input is set to 0
 all inputs are connected together
 inputs are left open
 one input is set to 1

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Digital Electronics
The output of a logic gate is 0 when all its inputs are at logic 0. The gate is either

 a NAND or an X-OR
 an AND or a NOR
 an OR or an X-OR
 an OR or an X-NOR

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