Microprocessor
Program counter in a digital computer

 Counts the number of times the loops are executed.
 Counts the numbers of programs run in the machine.
 Points the memory address of the next instruction to be fetched.
 Counts the number of times a subroutine is called.

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

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Microprocessor
A good assembly language programmer should use general purpose registers rather than memory in maximum possible ways for data processing. This is because:

 Data processing with registers is easier than with memory
 Data processing with memory requires more instructions in the program than that with registers
 Of limited set of instructions for data processing with memory
 Data processing with registers takes fewer cycles than that with memory

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Microprocessor
In a vector interrupt

 the branch address is assigned to a fixed location in memory.
 the interrupting source supplies the branch information to the processor through an interrupt vector.
 the branch address is obtained from a register in the processor.
 none.

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