Microprocessor
In a microcomputer , the address of memory locations are binary numbers that identify each memory circuit where a byte is stored. If a microcomputer uses 20-bit address, then numbers of different memory locations are

 220 - 1
 20
 220
 220-1

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Microprocessor
The interrupt facility is provided in microprocessor to

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

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