Microprocessor
Which of the following conditions is not allowed in an RS latch?

R is negated, S is asserted
R is negated, S is negated
R is asserted, S is asserted
R is asserted, S is negated

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Microprocessor
The stack pointer register in a microprocessor

 holds the address of the top of the stack
 counts the number of instructions being executing on the microprocessor
 counts the number of programs being executing on the microprocessor
 keeps the address of the next instruction to be fetched

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