Microprocessor
The interrupt facility is provided in microprocessor to

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

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Microprocessor
When referring to instruction words, a mnemonic is

 a short abbreviation for the operand address.
 shorthand for machine language.
 a short abbreviation for the data word stored at the operand address.
 a short abbreviation for the operation to be performed.

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