Microprocessor
The stack pointer register in a microprocessor

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

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Microprocessor
Assertion(A): Monostablemultivibrators (IC74121) are used in a microprocessor based system for frequency measurement. Reason(R): Microprocessor counts the number of interrupt signals/second or within a specified interval through ISR.

 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
In 8085

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

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