Microprocessor
Which one of the following statement is false?

 A microprocessor has bi-directional data bus
 A microprocessor has unidirectional address bus
 A microprocessor has an ALU
 A microprocessor has bi-directional address bus

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

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

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