Microprocessor
Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier.[Hint: Construct the truth table for the adder and the multiplier]

None of these
Circuit A has more gates than circuit B
Circuit A has the same number of gates as circuit B
Circuit B has more gates than circuit A

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Microprocessor
The output data lines of microprocessor and memories are usually tristated because

 More than one device can transmit information over the data bus by enabling only one device at a time
 The data line can be multiplexed for both input and output
 It increases the speed of data transfer over the data bus
 More than one device can transmit over the data bus at the same time

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