Microprocessor
The characteristics of RESET OUT signal is/are

 all.
 the signal is synchronized to the processor clock.
 this signal can be used to reset other devices.
 indicates that µp is being reset.

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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 another master is requesting the use of the address and data buses.
 Indicates that the CPU has not received the HOLD request.
 Hold the data in the accumulator until the microprocessor is turned OFF.

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