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
Which one of the following is not correct?

 Bus is a group of wires
 An interrupt signal is required at the start of every program
 An instruction is a set of bits that defines a computer operation
 Bootstrap is a technique or device for loading first instruction

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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 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.

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