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.

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

 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.
 A is false but R is true.
 A is true but R is false.

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Microprocessor
Program counter in a digital computer

 Counts the numbers of programs run in the machine.
 Counts the number of times the loops are executed.
 Points the memory address of the next instruction to be fetched.
 Counts the number of times a subroutine is called.

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