Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 X-OR
 OR
 AND
 X-NOR

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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?

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

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