Microprocessor
S0 and S1 pins are used for

 acknowledging the interrupt
None of these
 indicating the processor’s status
 serial communication

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Microprocessor
In a vector interrupt

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

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