Microprocessor
In an 8085 microprocessor based system, the contents of SP are 1000H, PUSH B instruction will transfer the contents of registers B & C respectively for memory locations

 0FFF H and 0FFE H
 1000 H and 0FFF H
 0FFE H and 0FFF H
 1000 H and 1001 H

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Microprocessor
HLDA signal in 8085 performs the following operation:

 Indicates that another master is requesting the use of the address and data buses.
 Indicates that the CPU has not received the HOLD request.
 Indicates that the CPU has received the HOLD request and that it will relinquish the bus in the next clock cycle.
 Hold the data in the accumulator until the microprocessor is turned OFF.

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Microprocessor
In a vector interrupt

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

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