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Digital Electronics

Digital Electronics
Positive integers must be represented by

 None of these
 unsigned number
 Both A and B
 signed numbers

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Digital Electronics
What is the minimum number of NAND gates required to realize an X-OR gate?

 6
 4
 3
 5

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Digital Electronics
A half adder has

 1 input and 1 output
 2 inputs and 2 output
 1 input and 2 outputs
 2 inputs and 1 outputs

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

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

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Digital Electronics
The hex address of the 256th memory location is

 00100
 00FFF
 001FF
 000FF

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Digital Electronics
Why small bubble is given on the output of the NAND gate symbol ?

 Open collector output
 Output is inverted
 Tristate
None of these

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