Microprocessor
The stack pointer register in a microprocessor

 keeps the address of the next instruction to be fetched
 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

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Microprocessor
In 8085 microprocessor , let the accumulator contains the value 0AH and register C contains the value 05H. After CMP C instruction is executed, the

 zero flag will be set and carry flag will be reset
 zero and carry flags will be reset
 zero flag will be reset and carry flag will be set
 zero and carry flags will be set

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Microprocessor
HLDA signal in 8085 performs the following operation:

 Indicates that the CPU has not received the HOLD request.
 Indicates that another master is requesting the use of the address and data buses.
 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
Assertion(A): Ready signal of microprocessor is used to detect whether a peripheral is ready for the data transfer or not. Reason(R): In the microprocessor during data transfer operations, the wait states are added by forcing the ready signal low.

 Both A & R are true but R is not the correct explanation of A .
 Both A & R are true and R is the correct explanation of A.
 A is true but R is false.
 A is false but R is true.

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