Microprocessor
The microprocessor issues ALE during first T-state of

 every machine cycle
 fetch cycle only
 memory WRITE cycle only
 memory READ cycle only

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Microprocessor
In a vector interrupt

 none.
 the branch address is obtained from a register in the processor.
 the branch address is assigned to a fixed location in memory.
 the interrupting source supplies the branch information to the processor through an interrupt vector.

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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.

 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.
 A is true but R is false.

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