Microprocessor
The address bus of any microprocessor is always

 Either unidirectional or bi-directional
 None
 Unidirectional
 Bi-directional

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Microprocessor
The interrupt facility is provided in microprocessor to

 keep a control on the working of the microprocessor
 stop the microprocessor when desired
 stop the microprocessor when it starts malfunctioning
 change the sequence of the instructions being executed

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