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

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

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Microprocessor
Ready pin of microprocessor is used

 to introduce wait state
 to indicate that microprocessor is ready to receive inputs
 to indicate that microprocessor is ready to receive outputs
 to provide direct memory access

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Microprocessor
How can we make any bit of a register “0”?

 AND that bit with “1” and remaining bits with “0”.
 OR that bit with “0” and remaining bits with “1”.
 OR that bit with “1” and remaining bits with “0”.
 AND that bit with “0” and remaining bits with “1”.

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