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Digital Electronics

Digital Electronics
What logic function is produced by adding an inverter to each input and output of an OR gate?

 AND
 X-OR
 NOR
 NAND

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Digital Electronics
An AND gate will function as OR if

Either of the inputs is “1”
All the inputs are ‘0’
All the inputs and outputs are complemente'
All the inputs to the gates are “1”

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Digital Electronics
The output of a NAND gate is low

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

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Digital Electronics
The code used in digital systems to represent decimal digits, letters, and other special characters such as + , – , . , * , etc. is

 octal
 natural BCD
 hexadecimal
 ASCII

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Digital Electronics
8421 code is

 alphanumeric code
 non-weighted code
 self-complementing code
 weighted code

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

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

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