Microprocessor
In 8085 microprocessor based system maximum possible number of input/output devices can be connected using I/O mapped I/O technique is

 256
 512
 64
 65536

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Microprocessor
The interrupt facility is provided in microprocessor to

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

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