Microprocessor
A mask programmed ROM is

 erasable and programmable
 erasable electrically
 programmed at the time of fabrication
 programmed by the user

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Microprocessor
The interrupt facility is provided in microprocessor to

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

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