Digital Electronics
The NAND-NAND realization is equivalent to

 OR-AND realization
 AND-OR realization
 NOT-OR realization
 AND-NOT realization

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Digital Electronics
Consider the representation of six-bit numbers by two’s complement, one’s complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000?

Sign and magnitude and one’s complement only
Two’s complement and one’s complement only
All three representations
Two’s complement only

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