Microprocessor
A microprocessor without the interrupt facility

 is best suited for process control system
 cannot be used for DMA operation
 is not useful for process control system
 cannot be interfaced with any I/O devices

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Microprocessor
When referring to instruction words, a mnemonic is

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

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