Microprocessor
The output data lines of microprocessor and memories are usually tristated because

 It increases the speed of data transfer over the data bus
 The data line can be multiplexed for both input and output
 More than one device can transmit over the data bus at the same time
 More than one device can transmit information over the data bus by enabling only one device at a time

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Microprocessor
Assertion(A): Segment override prefix (SOP) is used when a default offset register is not used with its default base segment register but with a different base register. Reason(R): The offset registers IP and SP can never be associated with any other segment registers apart from their respective default segments.

 A is true but R is false.
 A is false but R is true.
 Both A & R are true but R is not the correct explanation of A.
 Both A & R are true and R is the correct explanation of A.

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Microprocessor
Assertion(A): Ready signal of microprocessor is used to detect whether a peripheral is ready for the data transfer or not. Reason(R): In the microprocessor during data transfer operations, the wait states are added by forcing the ready signal low.

 A is true but R is false.
 A is false but R is true.
 Both A & R are true but R is not the correct explanation of A .
 Both A & R are true and R is the correct explanation of A.

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