Microprocessor
A bus connected between the CPU and main memory that permits transfer of information between main memory and the CPU is known as

 Address bus
 Memory bus
 DMA bus
 Control bus

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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 it starts malfunctioning
 stop the microprocessor when desired
 change the sequence of the instructions being executed

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