Microprocessor
In 8085 microprocessor which one of the following statement is wrong

 there is a pin available for serial input
 serial I/O is possible through SIM and RIM instruction
 there is a pin available for serial output
 serial I/O is not possible

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Microprocessor
HLDA signal in 8085 performs the following operation:

 Indicates that the CPU has received the HOLD request and that it will relinquish the bus in the next clock cycle.
 Indicates that the CPU has not received the HOLD request.
 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.

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