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 false but R is true.
 Both A & R are true but R is not the correct explanation of A .
 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
In 8085

P flag is set when the result has odd parity
P flag is reset when the result has even parity
P flag is reset when the result has odd parity
P flag is set when the result has even parity

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Microprocessor
The stack pointer register in a microprocessor

 counts the number of programs being executing on the microprocessor
 keeps the address of the next instruction to be fetched
 holds the address of the top of the stack
 counts the number of instructions being executing on the microprocessor

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