Microprocessor
The execution of RST n instruction causes the stack pointer to

 decrement by two
 increment by two
 remain unaffected
None of these

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Microprocessor
The interrupt facility is provided in microprocessor to

 change the sequence of the instructions being executed
 keep a control on the working of the microprocessor
 stop the microprocessor when desired
 stop the microprocessor when it starts malfunctioning

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Microprocessor
HLDA signal in 8085 performs the following operation:

 Hold the data in the accumulator until the microprocessor is turned OFF.
 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.

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