Microprocessor
SUB A instruction in 8085

 sets zero and carry flags
 reset carry and sign flags
 reset zero and parity flags
 sets zero and sign flags

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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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