Microprocessor
In microprocessor based system I/O ports are used to interface

 all the I/O devices
 the O/P devices only
 the I/P device only
 the I/O devices and memory chips

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Microprocessor
The interrupt facility is provided in microprocessor to

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

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Microprocessor
ALU (Arithmetic and Logic Unit ) of 8085 microprocessor consists of

 Accumulator, temporary register, arithmetic and logic circuits
 Accumulator, arithmetic and logic circuits
 Accumulator, arithmetic, logic circuits and five flags
 Accumulator, temporary register, arithmetic, logic circuits and five flags

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